Fix build issues

Reviewed-on: #7

.github/workflows/build.yml

@@ -8,11 +8,11 @@ env:
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
     tags:
-      - '**'
+      - "**"
   pull_request:
-    branches: [ main ]
+    branches: [main]
   workflow_dispatch:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
@@ -34,6 +34,11 @@ jobs:
           gpg -d --passphrase "${{ secrets.RELEASE_KEYSTORE_PASSWORD }}" --batch keystore.asc > app/keystore.properties
           gpg -d --passphrase "${{ secrets.RELEASE_KEYSTORE_PASSWORD }}" --batch key.asc > app/key.jks
 
+      - name: Generate Dynamic Release Notes
+        run: |
+          mkdir -p tmp/whatsnew
+          echo "Various improvements for you to experience..." > tmp/whatsnew/whatsnew-en-US
+
       - name: create and checkout branch
         if: github.event_name == 'pull_request'
         env:
@@ -62,7 +67,8 @@ jobs:
           else
             VERSION_NAME="${VERSION_BASE}"
           fi
-          ./gradlew assembleSignedRelease -PVERSION_CODE=$VERSION_CODE -PVERSION_NAME=$VERSION_NAME
+          printf '%s\n%s\n' "$VERSION_CODE" "$VERSION_NAME" > version.txt
+          ./gradlew bundleSignedRelease assembleSignedRelease -PVERSION_CODE=$VERSION_CODE -PVERSION_NAME=$VERSION_NAME
 
       - name: Upload APK
         uses: actions/upload-artifact@v7
@@ -71,15 +77,33 @@ jobs:
           compression-level: 0
           archive: false
 
+      - name: Determine prerelease
+        id: prerelease
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          if [[ "$GITHUB_REF_NAME" =~ ^[0-9]+(\.[0-9]+)+$ ]]; then
+            echo "value=false" >> "$GITHUB_OUTPUT"
+          else
+            echo "value=true" >> "$GITHUB_OUTPUT"
+          fi
+
       - name: Release
         uses: softprops/action-gh-release@v3
         if: startsWith(github.ref, 'refs/tags/')
         with:
           files: |
             app/build/outputs/apk/signedRelease/app-signedRelease.apk
-          prerelease: |
+            version.txt
-            if [[ ${{ github.ref }} =~ ^refs/tags/[0-9]+\.[0-9]+[a-z]+$ ]]; then
+          prerelease: ${{ steps.prerelease.outputs.value }}
-              echo "false"
+
-            else
+      - name: Upload to Google Play
-              echo "true"
+        uses: r0adkll/upload-google-play@v1
-            fi
+        if: github.event_name == 'push'
+        continue-on-error: true
+        with:
+          serviceAccountJsonPlainText: ${{ secrets.SERVICE_ACCOUNT_JSON }}
+          packageName: net.helcel.cowspent
+          releaseFiles: app/build/outputs/bundle/signedRelease/app-signedRelease.aab
+          tracks: ${{ startsWith(github.ref, 'refs/tags/') && 'production' || 'internal' }}
+          status: completed
+          whatsNewDirectory: tmp/whatsnew

PRIVACY.md

@@ -1,12 +1,74 @@
-# Cowspent Privacy Policy
+# Privacy Policy for Cowspent
 
-Cowspent does not collect any personal data.
+**App:** Cowspent (`net.helcel.cowspent`)
-This is a Free/Libre software so you can verify no data is collected
+**Developer:** Helcel
-by reading the source code or asking someone to do it.
+**Effective date:** 19 September 2026
 
-Members and bills are synchronized with
+## What we collect
-the Cospend server of your choice.
 
-CAMERA permission is used to read QR-codes.
+Nothing. We operate no servers and receive no data from the app. Cowspent
+contains no analytics, advertising, or tracking libraries.
 
-GET\_ACCOUNTS permission is used by Single-Sign-On library to access accounts from Nextcloud Files app.
+## Data you enter and where it goes
+
+Cowspent stores your projects, members, bills, categories, and app settings on
+your device.
+
+If you connect the app to a Cospend or IHateMoney server, this data is
+synchronised with **the server you choose**: either your own or one operated by
+a third party. That server's operator controls that copy of your data and their
+privacy policy applies to it. We are not involved in that transfer and cannot
+access it.
+
+Your server address, username, and password or access token are stored on your
+device and sent only to the server you configured, over the connection it
+provides. If you sign in through the Nextcloud Files app, authentication is
+handled by that app's Single Sign-On and we never see your password.
+
+## Sharing projects
+
+Project share links and QR codes are generated by your server. Anyone who
+obtains a link or code may be able to access the project, so share them only
+with people you trust.
+
+## Permissions
+
+- `INTERNET`, `ACCESS_NETWORK_STATE` — synchronising with your chosen server.
+- `CAMERA` — scanning QR codes to import a project. Images are processed on the
+  device, never stored or transmitted.
+- `GET_ACCOUNTS` — used by the Nextcloud Single Sign-On library to list accounts
+  from the Nextcloud Files app.
+
+## Retention and deletion
+
+Data on your device remains until you delete it. Clearing the app's data in
+Android Settings, or uninstalling Cowspent, removes the local copy and the
+stored credentials. Data already synchronised to a server must be deleted on
+that server, by you or its administrator.
+
+## Children
+
+Cowspent is suitable for all ages and collects no data from any user, including
+children.
+
+## Security
+
+Credentials and project data are held in the app's private storage, protected by
+the Android sandbox. Use an HTTPS server address so that synchronisation is
+encrypted in transit.
+
+## Open source
+
+Cowspent is released under the GNU General Public License v3.0. The full source
+is available at https://github.com/helcel-net/cowspent, so these statements can
+be independently verified.
+
+## Changes
+
+Any change affecting privacy will be published in this document before or with
+the release that introduces it.
+
+## Contact
+
+Email: net-helcel+privacy@gmail.com
+Issues: https://github.com/helcel-net/cowspent/issues

README.md

@@ -12,8 +12,6 @@ Which is originally a fork of [PhoneTrack-Android](https://gitlab.com/eneiluj/ph
 Which is itself a fork of [Nextcloud Notes for Android](https://github.com/stefan-niedermann/nextcloud-notes).
 Many thanks to their developers :heart: !
 
-
-
 </p>
 
 <a href="https://ko-fi.com/I2I615VP5M"><img src="https://ko-fi.com/img/githubbutton_sm.svg" alt="ko-fi"></a>
@@ -24,6 +22,7 @@ Many thanks to their developers :heart: !
 <a href="https://github.com/helcel-net/cowspent/actions/workflows/build.yml">
 <img src="https://github.com/helcel-net/cowspent/actions/workflows/build.yml/badge.svg?branch=main" alt="Build Status">
 </a>
+
 </div>
 
 ## 🌄 Screenshots
@@ -57,18 +56,27 @@ Extra Features:
 - Support for Cospend archived-status (hide archived projects by default)
 - Modern UI and code with Kotlin and Jetpack-Compose
 
-
 ## 📳 Installation
 
 <div style="display: flex; justify-content: center; align-items: center; flex-direction: row;">
     <a href="https://apt.izzysoft.de/fdroid/index/apk/net.helcel.cowspent">
-        <img width="200" height="80" alt="Izzy Download" src=".github/images/izzy.png">
+        <img width="200" height="84" alt="Izzy Download" src=".github/images/izzy.png">
     </a>
     <a href="https://github.com/helcel-net/cowspent/releases/latest">
         <img width="200" height="84" alt="APK Download" src=".github/images/apk.png">
     </a>
+    <a future-href="https://f-droid.org/en/packages/net.helcel.cowspent">
+        <img width="200" height="84" alt="Fdroid Download" src=".github/images/fdroid.png">
+    </a>
+    <a href="https://play.google.com/store/apps/details?id=net.helcel.cowspent">
+        <img width="200" height="84" alt="GooglePlay Download" src=".github/images/playstore.png">
+    </a>
 </div>
 
+Note:
+ - Fdroid: requested, see https://gitlab.com/fdroid/rfp/-/work_items/4412
+ - PlayStore: alpha test restriction by Google. To access, join https://groups.google.com/g/helcel-android-test
+
 ## ⚙️ Permissions
 
 - `CAMERA`: recommended for scanning barcodes from camera
@@ -88,6 +96,13 @@ Cowspent is a user-driven project. We welcome any contribution, big or small.
 
 Thanks to all contributors, the developers of our dependencies, and our users.
 
+## Signinig key
+
+```
+net.helcel.cowspent
+D3:EE:68:A8:5A:7F:35:A1:14:D2:74:B4:50:AA:CE:8C:ED:68:EA:C8:1A:A2:22:E2:7F:F5:0E:98:4C:C6:29
+```
+
 ## 📝 License
 
 ```

app/build.gradle

@@ -1,7 +1,7 @@
 plugins {
-    id 'com.android.application' version '9.3.2'
+    id 'com.android.application' version '9.5.1'
-    id 'org.jetbrains.kotlin.plugin.serialization' version '2.4.10'
+    id 'org.jetbrains.kotlin.plugin.serialization' version '2.4.20'
-    id 'org.jetbrains.kotlin.plugin.compose' version '2.4.10'
+    id 'org.jetbrains.kotlin.plugin.compose' version '2.4.20'
     id 'jacoco'
 }
 
@@ -118,21 +118,21 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.compose.foundation:foundation:1.12.0'
+    implementation 'androidx.compose.foundation:foundation:1.12.1'
-    implementation 'androidx.compose.runtime:runtime:1.12.0'
+    implementation 'androidx.compose.runtime:runtime:1.12.1'
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.5'
 
     implementation 'androidx.preference:preference-ktx:1.2.1'
-    implementation 'androidx.work:work-runtime-ktx:2.11.2'
+    implementation 'androidx.work:work-runtime-ktx:2.12.0'
 
     implementation 'com.google.zxing:core:3.5.4'
     implementation 'androidx.camera:camera-camera2:1.6.2'
     implementation 'androidx.camera:camera-lifecycle:1.6.2'
     implementation 'androidx.camera:camera-view:1.6.2'
-    implementation 'com.github.nextcloud:Android-SingleSignOn:1.3.4'
+    implementation 'com.github.nextcloud:Android-SingleSignOn:1.3.5'
     implementation 'com.opencsv:opencsv:5.12.0'
 
-    implementation platform('androidx.compose:compose-bom:2026.08.00')
+    implementation platform('androidx.compose:compose-bom:2026.09.00')
     implementation 'androidx.compose.ui:ui'
     implementation 'androidx.compose.material:material'
     implementation 'androidx.compose.material:material-icons-extended'
@@ -142,17 +142,17 @@ dependencies {
     implementation 'androidx.activity:activity-ktx:1.13.0'
     implementation 'androidx.security:security-crypto:1.1.0'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.11.0'
-    implementation "androidx.datastore:datastore-preferences:1.2.1"
+    implementation "androidx.datastore:datastore-preferences:1.3.0"
     implementation "com.google.crypto.tink:tink-android:1.23.0"
 
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'io.mockk:mockk:1.14.11'
-    testImplementation 'org.robolectric:robolectric:4.16.1'
+    testImplementation 'org.robolectric:robolectric:4.17'
     testImplementation 'androidx.test:core:1.7.0'
     testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.11.0'
     testImplementation 'androidx.compose.ui:ui-test-junit4'
 
-    androidTestImplementation platform('androidx.compose:compose-bom:2026.08.00')
+    androidTestImplementation platform('androidx.compose:compose-bom:2026.09.00')
     androidTestImplementation 'androidx.test.ext:junit:1.3.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.7.0'
     androidTestImplementation 'androidx.compose.ui:ui-test-junit4'

app/src/main/assets/adi-registration.properties

@@ -0,0 +1 @@
+CUE6FCSBR6JIAAAAAAAAAAAAAA

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillActivity.kt

@@ -9,6 +9,7 @@ import androidx.activity.enableEdgeToEdge
 import androidx.activity.compose.setContent
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
+import androidx.annotation.WorkerThread
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.runtime.remember
 import androidx.lifecycle.lifecycleScope
@@ -27,6 +28,10 @@ import net.helcel.cowspent.model.ProjectType
 import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
 import net.helcel.cowspent.theme.ThemeUtils
 import net.helcel.cowspent.util.BillParser
+import net.helcel.cowspent.util.BillPrefill
+import net.helcel.cowspent.util.BillTemplate
+import net.helcel.cowspent.util.CategorySuggester
+import net.helcel.cowspent.util.PrefillMode
 import net.helcel.cowspent.util.SupportUtil
 import java.text.ParseException
 import java.time.ZoneId
@@ -40,6 +45,9 @@ class EditBillActivity : AppCompatActivity() {
     private var projectType: ProjectType = ProjectType.LOCAL
     private val calendar = Calendar.getInstance()
 
+    // The pre-fill mode the form was opened with; null when the bill is not a fresh one.
+    private var prefillMode: PrefillMode? = null
+
     override fun onCreate(savedInstanceState: Bundle?) {
         enableEdgeToEdge()
         super.onCreate(savedInstanceState)
@@ -95,8 +103,14 @@ class EditBillActivity : AppCompatActivity() {
                             val createIntent = Intent(this@EditBillActivity, QrCodeScannerActivity::class.java)
                             scanQRCodeLauncher.launch(createIntent)
                         },
-                        onDuplicate = if (!viewModel.isNewBill) { { duplicateCurrentBill() } } else null,
+                        onDuplicate = if (!viewModel.isNewBill) {
-                        onDelete = if (!viewModel.isNewBill) { { deleteBillAsked() } } else null,
+                            { duplicateCurrentBill() }
+                        } else null,
+                        onDelete = if (!viewModel.isNewBill) {
+                            { deleteBillAsked() }
+                        } else null,
+                        onPrefillModeSelected = { onPrefillModeSelected(it) },
+                        onSavePrefillPreset = { onSavePrefillPreset() },
                         accessLevel = db.getProject(bill.projectId)?.myAccessLevel ?: DBProject.ACCESS_LEVEL_ADMIN
                     )
                 }
@@ -152,25 +166,13 @@ class EditBillActivity : AppCompatActivity() {
                 val billIdToDuplicate = intent.getLongExtra(PARAM_BILL_ID_TO_DUPLICATE, 0)
                 val timeNowSeconds = System.currentTimeMillis() / 1000
                 if (billIdToDuplicate == 0L) {
-                    val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+                    val mode = BillPrefill.mode(applicationContext, projectId)
-                    val fillFromLast = preferences.getBoolean(getString(R.string.pref_key_fill_new_bill_from_last), false)
+                    bill = newBill(
-                    val lastBill = if (fillFromLast) db.getLastBillOfProject(projectId) else null
+                        projectId,
-
+                        timeNowSeconds,
-                    if (lastBill != null) {
+                        BillPrefill.templateFor(applicationContext, db, projectId, mode)
-                        bill = DBBill(
-                            0, 0, projectId, lastBill.payerId, 0.0, timeNowSeconds,
-                            "", DBBill.STATE_ADDED, lastBill.repeat ?: DBBill.NON_REPEATED,
-                            lastBill.paymentMode, lastBill.categoryId, "", lastBill.paymentModeId
                     )
-                        bill.billOwers = lastBill.billOwers.map { DBBillOwer(0, 0, it.memberId) }
+                    prefillMode = mode
-                    } else {
-                        val project = db.getProject(projectId)
-                        bill = DBBill(
-                            0, 0, projectId, project?.lastPayerId ?: 0, 0.0, timeNowSeconds,
-                            "", DBBill.STATE_ADDED, DBBill.NON_REPEATED,
-                            DBBill.PAYMODE_NONE, DBBill.CATEGORY_NONE, "", DBBill.PAYMODE_ID_NONE
-                        )
-                    }
                 } else {
                     val btd = db.getBill(billIdToDuplicate)!!
                     bill = DBBill(
@@ -201,15 +203,99 @@ class EditBillActivity : AppCompatActivity() {
                 db.ensureDefaultLabels(bill.projectId, project.type)
             }
 
+            val hasPreset = BillPrefill.preset(applicationContext, bill.projectId) != null
+            val categoryMatcher = if (bill.id == 0L) autoCategoryMatcher(bill.projectId) else null
+
             withContext(Dispatchers.Main) {
                 viewModel.currencies = currencies
                 viewModel.mainCurrencyName = project?.currencyName ?: ""
                 viewModel.isNewBill = (bill.id == 0L)
+                viewModel.prefillMode = prefillMode
+                viewModel.hasPrefillPreset = hasPreset
                 viewModel.initFromBill(bill, members, customSplits)
+                categoryMatcher?.let { viewModel.enableAutoCategorize(it) }
             }
         }
     }
 
+    @WorkerThread
+    private fun autoCategoryMatcher(projectId: Long): ((String) -> Long?)? {
+        val preferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+        // The switch lives under Extra Features; with those off it is hidden, so it must not act.
+        if (!preferences.getBoolean(getString(R.string.pref_key_extra_features), false)) return null
+        if (!preferences.getBoolean(getString(R.string.pref_key_auto_categorize), false)) return null
+        val categorized = db.getBillsOfProject(projectId)
+            .filter { it.categoryId != DBBill.CATEGORY_NONE && it.state != DBBill.STATE_DELETED }
+        // Only categories the picker offers: the project's own, plus the built-in reimbursement.
+        val allowed = db.getCategories(projectId).map { it.id }.toSet() + DBBill.CATEGORY_REIMBURSEMENT
+        return { what -> CategorySuggester.confidentMatch(what, categorized, allowed) }
+    }
+
+    @WorkerThread
+    private fun newBill(projectId: Long, timestamp: Long, template: BillTemplate?): DBBill {
+        val project = db.getProject(projectId)
+        val lastPayerId = project?.lastPayerId ?: 0
+        if (template == null) {
+            return DBBill(
+                0, 0, projectId, lastPayerId, 0.0, timestamp,
+                "", DBBill.STATE_ADDED, DBBill.NON_REPEATED,
+                DBBill.PAYMODE_NONE, DBBill.CATEGORY_NONE, "", DBBill.PAYMODE_ID_NONE
+            )
+        }
+        val activeIds = db.getMembersOfProject(projectId, null).filter { it.isActivated }.map { it.id }.toSet()
+        return DBBill(
+            0, 0, projectId, if (template.payerId in activeIds) template.payerId else lastPayerId,
+            0.0, timestamp, "", DBBill.STATE_ADDED, template.repeat,
+            template.paymentMode, template.categoryId, "", template.paymentModeId
+        ).apply {
+            billOwers = template.owerIds.filter { it in activeIds }.map { DBBillOwer(0, 0, it) }
+        }
+    }
+
+    private fun onPrefillModeSelected(mode: PrefillMode) {
+        val projectId = bill.projectId
+        lifecycleScope.launch {
+            val template = withContext(Dispatchers.IO) {
+                BillPrefill.setMode(applicationContext, projectId, mode)
+                newBill(projectId, bill.timestamp, BillPrefill.templateFor(applicationContext, db, projectId, mode))
+            }
+            // Keep the reference bill in step, so the unsaved-changes check compares against
+            // what pre-filling put there rather than flagging it as the user's edit.
+            bill.payerId = template.payerId
+            bill.billOwers = template.billOwers
+            bill.categoryId = template.categoryId
+            bill.paymentMode = template.paymentMode
+            bill.paymentModeId = template.paymentModeId
+            bill.repeat = template.repeat
+            viewModel.prefillMode = mode
+            viewModel.applyPrefill(template)
+        }
+    }
+
+    private fun currentTemplate() = BillTemplate(
+        payerId = viewModel.payerId,
+        owerIds = viewModel.getOwersIds(),
+        categoryId = viewModel.categoryId,
+        paymentModeId = viewModel.paymentModeId,
+        paymentMode = bill.paymentMode,
+        repeat = viewModel.repeat
+    )
+
+    /** Saves the form's current values as the project's preset and switches to using it. */
+    private fun onSavePrefillPreset() {
+        val projectId = bill.projectId
+        val template = currentTemplate()
+        lifecycleScope.launch {
+            withContext(Dispatchers.IO) {
+                BillPrefill.savePreset(applicationContext, projectId, template)
+                BillPrefill.setMode(applicationContext, projectId, PrefillMode.PRESET)
+            }
+            viewModel.hasPrefillPreset = true
+            viewModel.prefillMode = PrefillMode.PRESET
+            showToast(this@EditBillActivity, getString(R.string.prefill_preset_saved))
+        }
+    }
+
     private val scanQRCodeLauncher =
         registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
             if (result.resultCode == RESULT_OK && result.data != null) {
@@ -282,8 +368,18 @@ class EditBillActivity : AppCompatActivity() {
         if (validationError != null) {
             showToast(this, validationError)
         } else {
+            // Taken before saving: saving can split the bill into one per ower, and the template
+            // should hold the whole selection rather than whichever split was written last.
+            val createdHere = bill.id == 0L
+            val template = currentTemplate()
             lifecycleScope.launch {
-                val savedBillId = withContext(Dispatchers.IO) { saveBill() }
+                val savedBillId = withContext(Dispatchers.IO) {
+                    saveBill().also { id ->
+                        if (createdHere && id != 0L) {
+                            BillPrefill.recordCreatedOnDevice(applicationContext, bill.projectId, template)
+                        }
+                    }
+                }
                 val data = Intent()
                 data.putExtra(MainConstants.SAVED_BILL_ID, savedBillId)
                 setResult(RESULT_OK, data)

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillScreen.kt

@@ -1,11 +1,14 @@
 package net.helcel.cowspent.android.bill_edit
 
 import android.annotation.SuppressLint
+import android.os.Build
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
@@ -19,18 +22,24 @@ import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.draw.scale
 import androidx.compose.ui.focus.FocusDirection
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.focus.onFocusChanged
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalFocusManager
+import androidx.compose.ui.res.colorResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
@@ -40,6 +49,7 @@ import net.helcel.cowspent.R
 import net.helcel.cowspent.android.helper.*
 import net.helcel.cowspent.model.*
 import net.helcel.cowspent.util.CategoryUtils
+import net.helcel.cowspent.util.PrefillMode
 import net.helcel.cowspent.util.SupportUtil
 import java.util.Date
 import kotlin.math.abs
@@ -57,11 +67,15 @@ fun EditBillScreen(
     onScan: () -> Unit,
     onDuplicate: (() -> Unit)? = null,
     onDelete: (() -> Unit)? = null,
+    onPrefillModeSelected: (PrefillMode) -> Unit = {},
+    onSavePrefillPreset: () -> Unit = {},
     accessLevel: Int = DBProject.ACCESS_LEVEL_ADMIN
 ) {
     val canEdit = accessLevel == DBProject.ACCESS_LEVEL_UNKNOWN || accessLevel >= DBProject.ACCESS_LEVEL_PARTICIPANT
     val context = LocalContext.current
     val focusRequester = remember { FocusRequester() }
+    var amountFocused by remember { mutableStateOf(false) }
+    var amountSelection by remember { mutableStateOf(TextRange(viewModel.amount.length)) }
 
     // The activity reads the project off the main thread and only then reports whether this is a
     // new bill, so the flag arrives after the first composition. Keying on it rather than on Unit
@@ -91,6 +105,14 @@ fun EditBillScreen(
                 },
                 actions = {
                     if (canEdit) {
+                        viewModel.prefillMode?.let { mode ->
+                            PrefillMenu(
+                                mode = mode,
+                                hasPreset = viewModel.hasPrefillPreset,
+                                onModeSelected = onPrefillModeSelected,
+                                onSavePreset = onSavePrefillPreset
+                            )
+                        }
                         IconButton(onClick = onScan) {
                             Icon(Icons.Default.QrCodeScanner, contentDescription = null)
                         }
@@ -118,7 +140,12 @@ fun EditBillScreen(
                 val errorOwers = stringResource(R.string.error_invalid_bill_owers)
                 val errorInvalidForm = stringResource(R.string.error_generic)
 
-                FloatingActionButton(onClick = {
+                FloatingActionButton(
+                    // Keep the button clear of the operator row pinned above the keyboard.
+                    modifier = Modifier.padding(
+                        bottom = if (amountFocused) MathOperatorRowHeight else 0.dp
+                    ),
+                    onClick = {
                         val validationError = viewModel.getValidationError(
                             errorWhat, errorDate, errorPayer, errorOwers, errorInvalidForm
                         )
@@ -141,8 +168,12 @@ fun EditBillScreen(
             modifier = Modifier
                 .padding(padding)
                 .imePadding()
-                .padding(16.dp)
                 .fillMaxSize()
+        ) {
+            Column(
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(16.dp)
                     .verticalScroll(scrollState)
             ) {
                 BillBasicInfoSection(
@@ -150,7 +181,10 @@ fun EditBillScreen(
                     canEdit = canEdit,
                     onDateClick = onDateClick,
                     onTimeClick = onTimeClick,
-                amountFocusRequester = focusRequester
+                    amountFocusRequester = focusRequester,
+                    amountSelection = amountSelection,
+                    onAmountSelectionChange = { amountSelection = it },
+                    onAmountFocusChange = { amountFocused = it }
                 )
 
                 Spacer(modifier = Modifier.height(8.dp))
@@ -178,6 +212,154 @@ fun EditBillScreen(
 
                 Spacer(modifier = Modifier.height(8.dp))
             }
+
+            if (amountFocused && canEdit) {
+                MathOperatorRow(onInsert = { op ->
+                    val text = viewModel.amount
+                    val start = amountSelection.min.coerceIn(0, text.length)
+                    val end = amountSelection.max.coerceIn(0, text.length)
+                    viewModel.amount = text.replaceRange(start, end, op)
+                    amountSelection = TextRange(start + op.length)
+                    viewModel.updateSplits()
+                })
+            }
+        }
+    }
+}
+
+private val MathOperatorRowHeight = 54.dp
+
+/**
+ * Chooses where this project's new bills take their payer, owers, category and payment mode
+ * from, and saves the form's current values as the project's preset.
+ */
+@Composable
+fun PrefillMenu(
+    mode: PrefillMode,
+    hasPreset: Boolean,
+    onModeSelected: (PrefillMode) -> Unit,
+    onSavePreset: () -> Unit
+) {
+    var expanded by remember { mutableStateOf(false) }
+    Box {
+        IconButton(onClick = { expanded = true }) {
+            Icon(Icons.Default.AutoFixHigh, contentDescription = stringResource(R.string.prefill_button))
+        }
+        DropdownMenu(expanded = expanded, onDismissRequest = { expanded = false }) {
+            val options = listOf(
+                PrefillMode.OFF to R.string.prefill_mode_off,
+                PrefillMode.LATEST_IN_PROJECT to R.string.prefill_mode_latest_project,
+                PrefillMode.LATEST_ON_DEVICE to R.string.prefill_mode_latest_device,
+                PrefillMode.PRESET to R.string.prefill_mode_preset
+            )
+            for ((option, label) in options) {
+                // The preset has nothing to fill from until one is saved.
+                val enabled = option != PrefillMode.PRESET || hasPreset
+                DropdownMenuItem(
+                    enabled = enabled,
+                    onClick = {
+                        expanded = false
+                        onModeSelected(option)
+                    }
+                ) {
+                    RadioButton(selected = option == mode, onClick = null, enabled = enabled)
+                    Spacer(Modifier.width(12.dp))
+                    Column {
+                        Text(stringResource(label))
+                        if (!enabled) {
+                            Text(
+                                text = stringResource(R.string.prefill_mode_preset_empty),
+                                style = MaterialTheme.typography.caption
+                            )
+                        }
+                    }
+                }
+            }
+            Divider(modifier = Modifier.padding(vertical = 4.dp))
+            DropdownMenuItem(onClick = {
+                expanded = false
+                onSavePreset()
+            }) {
+                Icon(Icons.Default.Save, contentDescription = null)
+                Spacer(Modifier.width(12.dp))
+                Text(stringResource(R.string.prefill_save_preset))
+            }
+        }
+    }
+}
+
+private data class KeyboardColors(val tray: Color, val edge: Color, val key: Color, val label: Color)
+
+@Composable
+private fun keyboardColors(): KeyboardColors {
+    val dark = isSystemInDarkTheme()
+    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        val (tray, edge) = when {
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE -> if (dark) {
+                colorResource(android.R.color.system_surface_container_dark) to
+                    colorResource(android.R.color.system_surface_container_high_dark)
+            } else {
+                colorResource(android.R.color.system_surface_container_light) to
+                    colorResource(android.R.color.system_surface_container_high_light)
+            }
+
+            else -> if (dark) {
+                colorResource(android.R.color.system_neutral1_900) to
+                    colorResource(android.R.color.system_neutral1_800)
+            } else {
+                colorResource(android.R.color.system_neutral1_50) to
+                    colorResource(android.R.color.system_neutral1_100)
+            }
+        }
+        if (dark) KeyboardColors(
+            tray = tray,
+            edge = edge,
+            key = colorResource(android.R.color.system_accent2_700),
+            label = colorResource(android.R.color.system_neutral1_50)
+        ) else KeyboardColors(
+            tray = tray,
+            edge = edge,
+            key = colorResource(android.R.color.system_accent2_100),
+            label = colorResource(android.R.color.system_neutral1_900)
+        )
+    } else {
+        if (dark) KeyboardColors(Color(0xFF1B1B1F), Color(0xFF2B2B2F), Color(0xFF43474E), Color(0xFFE3E2E6))
+        else KeyboardColors(Color(0xFFEEEDF6), Color(0xFFE7E7F0), Color(0xFFDDE2F9), Color(0xFF1B1B1F))
+    }
+}
+
+/** Operator keys shown above the numeric keypad, which has no room for them itself. */
+@Composable
+fun MathOperatorRow(onInsert: (String) -> Unit) {
+    val colors = keyboardColors()
+    Surface(color = colors.tray) {
+        // Flat pill-shaped keys, styled like the keyboard's own function keys (e.g. its minus).
+        val keyShape = RoundedCornerShape(percent = 50)
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(MathOperatorRowHeight)
+                .drawBehind {
+                    // A thin edge in the same tone the keyboard uses for its own top border.
+                    drawLine(colors.edge, Offset(0f, 0f), Offset(size.width, 0f), 1.dp.toPx())
+                }
+                .padding(horizontal = 3.dp, vertical = 5.dp)
+        ) {
+            listOf("(" to "(", ")" to ")", "+" to "+", "−" to "-", "×" to "*", "÷" to "/").forEach { (label, op) ->
+                Box(
+                    modifier = Modifier
+                        .weight(1f)
+                        .fillMaxHeight()
+                        .padding(horizontal = 3.dp)
+                        .clip(keyShape)
+                        .background(colors.key)
+                        .clickable { onInsert(op) },
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(label, fontSize = 24.sp, color = colors.label)
+                }
+            }
+        }
     }
 }
 
@@ -187,7 +369,10 @@ fun BillBasicInfoSection(
     canEdit: Boolean,
     onDateClick: () -> Unit,
     onTimeClick: () -> Unit,
-    amountFocusRequester: FocusRequester
+    amountFocusRequester: FocusRequester,
+    amountSelection: TextRange = TextRange(viewModel.amount.length),
+    onAmountSelectionChange: (TextRange) -> Unit = {},
+    onAmountFocusChange: (Boolean) -> Unit = {}
 ) {
     Text(
         text = "GENERAL",
@@ -203,15 +388,29 @@ fun BillBasicInfoSection(
         stringResource(R.string.currency_dialog_title, viewModel.mainCurrencyName)
 
     OutlinedTextField(
-        value = viewModel.amount,
+        value = TextFieldValue(
+            text = viewModel.amount,
+            selection = TextRange(
+                amountSelection.start.coerceIn(0, viewModel.amount.length),
+                amountSelection.end.coerceIn(0, viewModel.amount.length)
+            )
+        ),
         onValueChange = { nv ->
-            val filteredValue = nv.filter { it in "0123456789.+-*/" }
+            val filteredValue = nv.text.filter { it in "0123456789.,+-*/()" }
+            onAmountSelectionChange(
+                if (filteredValue == nv.text) nv.selection else TextRange(filteredValue.length)
+            )
+            if (filteredValue != viewModel.amount) {
                 viewModel.amount = filteredValue
                 viewModel.updateSplits()
+            }
         },
         enabled = canEdit,
         placeholder = { Text("0") },
-        modifier = Modifier.fillMaxWidth().focusRequester(amountFocusRequester),
+        modifier = Modifier
+            .fillMaxWidth()
+            .focusRequester(amountFocusRequester)
+            .onFocusChanged { onAmountFocusChange(it.isFocused) },
         leadingIcon = {
             val currencyToShow = viewModel.selectedCurrencyName.ifEmpty {
                 viewModel.mainCurrencyName.ifEmpty { "$" }
@@ -245,7 +444,7 @@ fun BillBasicInfoSection(
                 Icon(Icons.Default.SwapHoriz, contentDescription = "Change Currency")
             }
         },
-        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Phone, imeAction = ImeAction.Next),
+        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal, imeAction = ImeAction.Next),
         keyboardActions = KeyboardActions(onNext = { focusManager.moveFocus(FocusDirection.Next) })
     )
 
@@ -253,7 +452,7 @@ fun BillBasicInfoSection(
 
     OutlinedTextField(
         value = viewModel.what,
-        onValueChange = { viewModel.what = it },
+        onValueChange = { viewModel.updateWhat(it) },
         enabled = canEdit,
         placeholder = { Text(stringResource(R.string.label_what)) },
         modifier = Modifier.fillMaxWidth(),
@@ -473,7 +672,7 @@ fun OwerSelectionSection(
                 BasicTextField(
                     value = value,
                     onValueChange = { nv ->
-                        val filteredValue = nv.filter { it in "0123456789.+-*/" }
+                        val filteredValue = nv.filter { it in "0123456789,.+-*/" }
                         if (viewModel.splitMode == SplitMode.PERCENT) {
                             viewModel.owersPercentSplit[member.id] = filteredValue
                         } else {
@@ -557,7 +756,7 @@ fun BillAdditionalDetailsSection(
         },
         content = {
             DropdownMenuItem(onClick = {
-                viewModel.categoryId = 0
+                viewModel.selectCategory(DBBill.CATEGORY_NONE)
                 categoryExpanded = false
             }) {
                 Icon(Icons.Default.Close, tint = Color.Red, contentDescription = null)
@@ -566,7 +765,7 @@ fun BillAdditionalDetailsSection(
             }
 
             DropdownMenuItem(onClick = {
-                viewModel.categoryId = DBBill.CATEGORY_REIMBURSEMENT
+                viewModel.selectCategory(DBBill.CATEGORY_REIMBURSEMENT)
                 categoryExpanded = false
             }) {
                 Text(text = "\uD83D\uDCB0", fontSize = 20.sp)
@@ -576,7 +775,7 @@ fun BillAdditionalDetailsSection(
 
             categories.filter { it.remoteId != DBBill.CATEGORY_REIMBURSEMENT }.forEach { category ->
                 DropdownMenuItem(onClick = {
-                    viewModel.categoryId = category.id
+                    viewModel.selectCategory(category.id)
                     categoryExpanded = false
                 }) {
                     Text(text = category.icon, fontSize = 20.sp)

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillViewModel.kt

@@ -13,6 +13,7 @@ import net.helcel.cowspent.android.helper.parseAmount
 import net.helcel.cowspent.model.DBBill
 import net.helcel.cowspent.model.DBCurrency
 import net.helcel.cowspent.model.DBMember
+import net.helcel.cowspent.util.PrefillMode
 import net.helcel.cowspent.util.SupportUtil
 import net.helcel.cowspent.util.evalMath
 
@@ -31,6 +32,20 @@ class EditBillViewModel : ViewModel() {
     var categoryId by mutableLongStateOf(0L)
     var isNewBill by mutableStateOf(false)
 
+    // Null hides the pre-fill menu: it only applies to a bill started from scratch.
+    var prefillMode by mutableStateOf<PrefillMode?>(null)
+    var hasPrefillPreset by mutableStateOf(false)
+
+    // Auto-categorization: null while it is off, or for a bill that is not new.
+    private var autoCategorizer: ((String) -> Long?)? = null
+
+    // Once the user picks a category themselves, the name no longer gets a say.
+    private var categoryChosenByUser = false
+
+    // The category in place before an automatic one replaced it, to restore when the name stops
+    // matching; null while no automatic category is applied.
+    private var categoryBeforeAuto: Long? = null
+
     var currencies by mutableStateOf<List<DBCurrency>>(emptyList())
     var mainCurrencyName by mutableStateOf("")
     var selectedCurrencyName by mutableStateOf("")
@@ -48,11 +63,12 @@ class EditBillViewModel : ViewModel() {
         if (input.isBlank()) return 0.0
         val sanitized = input.replace(',', '.')
         // If it contains any math operator, try evalMath first
-        if (sanitized.any { it in "+-*/" }) {
+        if (sanitized.any { it in "+-*/()" }) {
             try {
                 val result = evalMath(sanitized)
                 if (result != 0.0) return SupportUtil.round2(result)
-            } catch (_: Exception) {}
+            } catch (_: Exception) {
+            }
         }
         val parsed = parseAmount(input) ?: 0.0
         return SupportUtil.round2(parsed)
@@ -279,6 +295,48 @@ class EditBillViewModel : ViewModel() {
         }
     }
 
+    fun applyPrefill(bill: DBBill) {
+        payerId = bill.payerId
+        categoryId = bill.categoryId
+        paymentModeId = bill.paymentModeId
+        repeat = bill.repeat ?: DBBill.NON_REPEATED
+        val owerIds = bill.billOwersIds.toSet()
+        for (member in members) {
+            toggleMember(member.id, member.id in owerIds)
+        }
+        // The pre-filled category is the new fallback; a name match still wins over it.
+        categoryBeforeAuto = null
+        autoCategorize()
+    }
+
+    fun enableAutoCategorize(match: (String) -> Long?) {
+        autoCategorizer = match
+    }
+
+    fun updateWhat(value: String) {
+        what = value
+        autoCategorize()
+    }
+
+    fun selectCategory(id: Long) {
+        categoryId = id
+        categoryChosenByUser = true
+        categoryBeforeAuto = null
+    }
+
+    private fun autoCategorize() {
+        val match = autoCategorizer ?: return
+        if (!isNewBill || categoryChosenByUser) return
+        val categoryForName = match(what)
+        if (categoryForName != null) {
+            if (categoryBeforeAuto == null) categoryBeforeAuto = categoryId
+            categoryId = categoryForName
+        } else {
+            categoryBeforeAuto?.let { categoryId = it }
+            categoryBeforeAuto = null
+        }
+    }
+
     fun isFormValid(): Boolean {
         return what.isNotEmpty() &&
                 timestamp != 0L &&

app/src/main/java/net/helcel/cowspent/android/bill_label/LabelBillsViewModel.kt

@@ -8,6 +8,7 @@ import androidx.lifecycle.ViewModel
 import net.helcel.cowspent.model.DBBill
 import net.helcel.cowspent.model.DBCategory
 import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.CategorySuggester
 
 class LabelBillsViewModel : ViewModel() {
     var billsToLabel by mutableStateOf<List<DBBill>>(emptyList())
@@ -32,26 +33,9 @@ class LabelBillsViewModel : ViewModel() {
             suggestedCategories = emptyList()
             return
         }
-        val name = bill.what.lowercase().trim()
+        suggestedCategories = CategorySuggester.rank(bill.what, allCategorizedBills)
-        if (name.isEmpty()) {
-            suggestedCategories = emptyList()
-            return
-        }
-
-        val matches = allCategorizedBills.filter {
-            val otherName = it.what.lowercase().trim()
-            otherName == name || (name.length > 3 && otherName.contains(name)) || (otherName.length > 3 && name.contains(otherName))
-        }
-
-        val counts = matches.groupBy { it.categoryId }
-            .mapValues { it.value.size }
-            .toList()
-            .sortedByDescending { it.second }
             .take(2)
-
+            .mapNotNull { (catId, _) -> categoriesMap[catId] }
-        suggestedCategories = counts.mapNotNull { (catId, _) ->
-            categoriesMap[catId]
-        }
     }
 
     fun labelCurrentBill(db: CowspentSQLiteOpenHelper, categoryId: Long) {

app/src/main/java/net/helcel/cowspent/android/project/settle/ProjectSettlementScreen.kt

@@ -48,8 +48,10 @@ import net.helcel.cowspent.model.Transaction
 import net.helcel.cowspent.model.UserItem
 import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
 import net.helcel.cowspent.util.SupportUtil
+import net.helcel.cowspent.util.SupportUtil.SETTLE_DIRECT
 import net.helcel.cowspent.util.SupportUtil.SETTLE_OPTIMAL
 import net.helcel.cowspent.util.SupportUtil.settleBills
+import net.helcel.cowspent.util.SupportUtil.settleBillsDirect
 
 @Composable
 fun ProjectSettlementDialogContent(
@@ -60,10 +62,12 @@ fun ProjectSettlementDialogContent(
     onDismiss: () -> Unit
 ) {
     val centerNoneStr = stringResource(R.string.center_none)
+    val centerDirectStr = stringResource(R.string.center_none_direct)
     val memberList = remember(proj.id) { db.getMembersOfProject(proj.id, null) }
-    val userList = remember(memberList, centerNoneStr) {
+    val userList = remember(memberList, centerNoneStr, centerDirectStr) {
         buildList {
             add(UserItem(SETTLE_OPTIMAL, centerNoneStr))
+            add(UserItem(SETTLE_DIRECT, centerDirectStr))
             addAll(memberList.map { UserItem(it.id, it.name) })
         }
     }
@@ -91,8 +95,12 @@ fun ProjectSettlementDialogContent(
     }
 
     val transactions = remember(selectedMemberId, membersBalance, membersSortedByName) {
+        if (selectedMemberId == SETTLE_DIRECT) {
+            settleBillsDirect(membersSortedByName, db.getBillsOfProject(proj.id))
+        } else {
             settleBills(membersSortedByName, membersBalance, selectedMemberId)
         }
+    }
 
     ProjectSettlementUI(
         transactions = transactions,

app/src/main/java/net/helcel/cowspent/android/settings/SettingsScreen.kt

@@ -32,6 +32,7 @@ import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.AccountCircle
 import androidx.compose.material.icons.filled.Archive
 import androidx.compose.material.icons.filled.Brightness2
+import androidx.compose.material.icons.filled.Category
 import androidx.compose.material.icons.filled.Group
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.Palette
@@ -95,8 +96,8 @@ fun SettingsScreen(
     val keyShowArchived = stringResource(R.string.pref_key_show_archived)
     val keyExtraFeatures = stringResource(R.string.pref_key_extra_features)
     val keyStatsIncludeDeactivated = stringResource(R.string.pref_key_stats_include_deactivated)
+    val keyAutoCategorize = stringResource(R.string.pref_key_auto_categorize)
     val keyFullSyncDelay = stringResource(R.string.pref_key_full_sync_delay)
-    val keyFillNewBillFromLast = stringResource(R.string.pref_key_fill_new_bill_from_last)
     val keyLastAccountSync = stringResource(R.string.pref_key_last_account_sync_timestamp)
 
     val isNextcloudConfigured = CowspentServerSyncHelper.isNextcloudAccountConfigured(context)
@@ -150,12 +151,12 @@ fun SettingsScreen(
     var extraFeatures by remember(keyExtraFeatures) {
         mutableStateOf(sharedPreferences.getBoolean(keyExtraFeatures, false))
     }
-    var fillNewBillFromLast by remember(keyFillNewBillFromLast) {
-        mutableStateOf(sharedPreferences.getBoolean(keyFillNewBillFromLast, false))
-    }
     var statsIncludeDeactivated by remember(keyStatsIncludeDeactivated) {
         mutableStateOf(sharedPreferences.getBoolean(keyStatsIncludeDeactivated, false))
     }
+    var autoCategorize by remember(keyAutoCategorize) {
+        mutableStateOf(sharedPreferences.getBoolean(keyAutoCategorize, false))
+    }
     
     val fullSyncDelays = SyncSettings.FULL_SYNC_DELAY_CHOICES_MINUTES
     val fullSyncDelayLabels = listOf(
@@ -341,19 +342,6 @@ fun SettingsScreen(
                     }
                 )
 
-                SettingsSwitchPreference(
-                    title = stringResource(R.string.settings_fill_new_bill_from_last),
-                    summary = stringResource(R.string.settings_fill_new_bill_from_last_summary),
-                    icon = Icons.Default.Info,
-                    checked = fillNewBillFromLast,
-                    onCheckedChange = {
-                        fillNewBillFromLast = it
-                        sharedPreferences.edit {
-                            putBoolean(keyFillNewBillFromLast, it)
-                        }
-                    }
-                )
-
                 SettingsSwitchPreference(
                     title = stringResource(R.string.settings_stats_include_deactivated),
                     icon = Icons.Default.Group,
@@ -366,6 +354,19 @@ fun SettingsScreen(
                     }
                 )
 
+                SettingsSwitchPreference(
+                    title = stringResource(R.string.settings_auto_categorize),
+                    summary = stringResource(R.string.settings_auto_categorize_summary),
+                    icon = Icons.Default.Category,
+                    checked = autoCategorize,
+                    onCheckedChange = {
+                        autoCategorize = it
+                        sharedPreferences.edit {
+                            putBoolean(keyAutoCategorize, it)
+                        }
+                    }
+                )
+
                 SettingsSliderPreference(
                     title = stringResource(R.string.settings_full_sync_delay),
                     summary = stringResource(R.string.settings_full_sync_delay_summary),

app/src/main/java/net/helcel/cowspent/persistence/CowspentSQLiteOpenHelper.kt

@@ -21,6 +21,7 @@ import net.helcel.cowspent.model.DBMember
 import net.helcel.cowspent.model.DBPaymentMode
 import net.helcel.cowspent.model.DBProject
 import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.util.BillPrefill
 import net.helcel.cowspent.util.CategoryUtils
 import net.helcel.cowspent.util.SecureStorage
 import net.helcel.cowspent.util.SupportUtil
@@ -312,6 +313,7 @@ class CowspentSQLiteOpenHelper private constructor(val context: Context) :
             db.delete(table_projects, "$key_id = ?", projectId)
         }
         SecureStorage.removePasswordSync(context, "ProjectPassword_$id")
+        BillPrefill.clear(context, id)
     }
 
     // --- Members logic ---

app/src/main/java/net/helcel/cowspent/util/BillPrefill.kt

@@ -0,0 +1,163 @@
+package net.helcel.cowspent.util
+
+import android.content.Context
+import androidx.annotation.WorkerThread
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
+import net.helcel.cowspent.R
+import net.helcel.cowspent.model.DBBill
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import org.json.JSONArray
+import org.json.JSONException
+import org.json.JSONObject
+
+/** Where a new bill takes its payer, owers, category, payment mode and repeat from. */
+enum class PrefillMode(val id: String) {
+    /** Start from an empty form (the project's last payer is still suggested). */
+    OFF("off"),
+
+    /** The most recent bill of the project, whoever created it and on whichever device. */
+    LATEST_IN_PROJECT("project"),
+
+    /**
+     * The last bill created on this device. When entering a batch of older bills, the project's
+     * newest bill keeps changing under you as other members sync theirs, while this one only
+     * follows what you typed.
+     */
+    LATEST_ON_DEVICE("device"),
+
+    /** Values the user saved once for the project and wants every time. */
+    PRESET("preset");
+
+    companion object {
+        fun fromId(id: String?): PrefillMode? = entries.firstOrNull { it.id == id }
+    }
+}
+
+/**
+ * The part of a bill that pre-filling carries over. Amount, description, date and comment are
+ * deliberately absent: those describe the one expense, not the habit.
+ */
+data class BillTemplate(
+    val payerId: Long,
+    val owerIds: List<Long>,
+    val categoryId: Long,
+    val paymentModeId: Long,
+    val paymentMode: String?,
+    val repeat: String
+) {
+    fun toJson(): String = JSONObject()
+        .put(KEY_PAYER, payerId)
+        .put(KEY_OWERS, JSONArray(owerIds))
+        .put(KEY_CATEGORY, categoryId)
+        .put(KEY_PAYMENT_MODE_ID, paymentModeId)
+        .put(KEY_PAYMENT_MODE, paymentMode ?: JSONObject.NULL)
+        .put(KEY_REPEAT, repeat)
+        .toString()
+
+    companion object {
+        private const val KEY_PAYER = "payer"
+        private const val KEY_OWERS = "owers"
+        private const val KEY_CATEGORY = "category"
+        private const val KEY_PAYMENT_MODE_ID = "paymentModeId"
+        private const val KEY_PAYMENT_MODE = "paymentMode"
+        private const val KEY_REPEAT = "repeat"
+
+        fun of(bill: DBBill) = BillTemplate(
+            payerId = bill.payerId,
+            owerIds = bill.billOwersIds,
+            categoryId = bill.categoryId,
+            paymentModeId = bill.paymentModeId,
+            paymentMode = bill.paymentMode,
+            repeat = bill.repeat ?: DBBill.NON_REPEATED
+        )
+
+        /** Null for a missing or unreadable value, so a corrupt entry acts as "nothing saved". */
+        fun fromJson(json: String?): BillTemplate? {
+            if (json.isNullOrEmpty()) return null
+            return try {
+                val o = JSONObject(json)
+                val owers = o.getJSONArray(KEY_OWERS)
+                BillTemplate(
+                    payerId = o.getLong(KEY_PAYER),
+                    owerIds = List(owers.length()) { owers.getLong(it) },
+                    categoryId = o.optLong(KEY_CATEGORY, DBBill.CATEGORY_NONE),
+                    paymentModeId = o.optLong(KEY_PAYMENT_MODE_ID, DBBill.PAYMODE_ID_NONE),
+                    paymentMode = if (o.isNull(KEY_PAYMENT_MODE)) null else o.getString(KEY_PAYMENT_MODE),
+                    repeat = o.optString(KEY_REPEAT, DBBill.NON_REPEATED)
+                )
+            } catch (_: JSONException) {
+                null
+            }
+        }
+    }
+}
+
+/**
+ * Per-project pre-fill choice and the templates behind it. Everything lives in this device's
+ * preferences: "latest on this device" is device-local by definition, and the mode and preset
+ * describe how this user enters bills, not something the other members should get.
+ */
+object BillPrefill {
+
+    private fun modeKey(projectId: Long) = "prefill_mode_$projectId"
+    private fun deviceKey(projectId: Long) = "prefill_device_$projectId"
+    private fun presetKey(projectId: Long) = "prefill_preset_$projectId"
+
+    private fun prefs(context: Context) = PreferenceManager.getDefaultSharedPreferences(context)
+
+    fun mode(context: Context, projectId: Long): PrefillMode {
+        val prefs = prefs(context)
+        PrefillMode.fromId(prefs.getString(modeKey(projectId), null))?.let { return it }
+        // This used to be one global on/off switch. Projects that never picked a mode keep
+        // behaving the way that switch said.
+        val legacyOn = prefs.getBoolean(context.getString(R.string.pref_key_fill_new_bill_from_last), false)
+        return if (legacyOn) PrefillMode.LATEST_IN_PROJECT else PrefillMode.OFF
+    }
+
+    fun setMode(context: Context, projectId: Long, mode: PrefillMode) {
+        prefs(context).edit { putString(modeKey(projectId), mode.id) }
+    }
+
+    fun deviceTemplate(context: Context, projectId: Long): BillTemplate? =
+        BillTemplate.fromJson(prefs(context).getString(deviceKey(projectId), null))
+
+    /** Called for every bill created here, whatever the mode, so switching to it later works. */
+    fun recordCreatedOnDevice(context: Context, projectId: Long, template: BillTemplate) {
+        prefs(context).edit { putString(deviceKey(projectId), template.toJson()) }
+    }
+
+    fun preset(context: Context, projectId: Long): BillTemplate? =
+        BillTemplate.fromJson(prefs(context).getString(presetKey(projectId), null))
+
+    fun savePreset(context: Context, projectId: Long, template: BillTemplate) {
+        prefs(context).edit { putString(presetKey(projectId), template.toJson()) }
+    }
+
+    /** Forget everything stored for a project, e.g. once it is removed from the device. */
+    fun clear(context: Context, projectId: Long) {
+        prefs(context).edit {
+            remove(modeKey(projectId))
+            remove(deviceKey(projectId))
+            remove(presetKey(projectId))
+        }
+    }
+
+    /**
+     * The template [mode] points at, or null when there is nothing to fill from: the mode is
+     * off, the project has no bill yet, nothing was created on this device, or no preset was
+     * saved. Callers then fall back to an empty form.
+     */
+    @WorkerThread
+    fun templateFor(
+        context: Context,
+        db: CowspentSQLiteOpenHelper,
+        projectId: Long,
+        mode: PrefillMode = mode(context, projectId)
+    ): BillTemplate? = when (mode) {
+        PrefillMode.OFF -> null
+        PrefillMode.LATEST_IN_PROJECT -> db.getLastBillOfProject(projectId)?.let(BillTemplate::of)
+        PrefillMode.LATEST_ON_DEVICE -> deviceTemplate(context, projectId)
+        PrefillMode.PRESET -> preset(context, projectId)
+    }
+}

app/src/main/java/net/helcel/cowspent/util/CategorySuggester.kt

@@ -0,0 +1,64 @@
+package net.helcel.cowspent.util
+
+import net.helcel.cowspent.model.DBBill
+
+/**
+ * Guesses a bill's category from the names of bills that already have one.
+ *
+ * The bill-labelling screen shows the top guesses and lets the user pick; the bill editor can
+ * apply one by itself, so it asks [confidentMatch] instead, which only answers when the history
+ * clearly agrees.
+ */
+object CategorySuggester {
+
+    /** Below this length a name matches too many others by containment ("a", "bus", ...). */
+    private const val MIN_CONTAINMENT_LENGTH = 4
+
+    /** Share of the matching bills the leading category needs before it is applied unasked. */
+    private const val CONFIDENT_SHARE = 0.75
+
+    /** Matches by containment are looser, so one of them alone is not enough. */
+    private const val MIN_LOOSE_MATCHES = 2
+
+    private fun normalize(name: String) = name.lowercase().trim()
+
+    private fun isExactMatch(name: String, other: String) = other == name
+
+    private fun isLooseMatch(name: String, other: String) =
+        (name.length >= MIN_CONTAINMENT_LENGTH && other.contains(name)) ||
+                (other.length >= MIN_CONTAINMENT_LENGTH && name.contains(other))
+
+    fun rank(what: String, categorizedBills: List<DBBill>): List<Pair<Long, Int>> {
+        val name = normalize(what)
+        if (name.isEmpty()) return emptyList()
+        return categorizedBills
+            .filter { val other = normalize(it.what); isExactMatch(name, other) || isLooseMatch(name, other) }
+            .groupingBy { it.categoryId }
+            .eachCount()
+            .toList()
+            .sortedByDescending { it.second }
+    }
+
+    fun confidentMatch(
+        what: String,
+        categorizedBills: List<DBBill>,
+        allowedCategoryIds: Set<Long>
+    ): Long? {
+        val name = normalize(what)
+        if (name.isEmpty()) return null
+        val candidates = categorizedBills.filter { it.categoryId in allowedCategoryIds }
+
+        val exact = candidates.filter { isExactMatch(name, normalize(it.what)) }
+        if (exact.isNotEmpty()) return dominant(exact, minCount = 1)
+
+        val loose = candidates.filter { isLooseMatch(name, normalize(it.what)) }
+        return dominant(loose, minCount = MIN_LOOSE_MATCHES)
+    }
+
+    private fun dominant(bills: List<DBBill>, minCount: Int): Long? {
+        if (bills.size < minCount) return null
+        val (categoryId, count) = bills.groupingBy { it.categoryId }.eachCount().maxByOrNull { it.value }
+            ?: return null
+        return if (count >= minCount && count >= bills.size * CONFIDENT_SHARE) categoryId else null
+    }
+}

app/src/main/java/net/helcel/cowspent/util/SupportUtil.kt

@@ -167,6 +167,39 @@ object SupportUtil {
     }
 
     const val SETTLE_OPTIMAL: Long = 0
+    const val SETTLE_DIRECT: Long = -1
+
+    @JvmStatic
+    fun settleBillsDirect(members: List<DBMember>, bills: List<DBBill>): List<Transaction> {
+        val membersWeight = members.associate { it.id to it.weight }
+        // owed[debtor][creditor] = total the debtor owes the creditor over all bills
+        val owed = HashMap<Long, HashMap<Long, Double>>()
+
+        for (b in bills) {
+            if (b.state == DBBill.STATE_DELETED) continue
+            val nbOwerShares = b.billOwers.sumOf { membersWeight[it.memberId] ?: 0.0 }
+            if (nbOwerShares <= 0.0) continue
+            for (bo in b.billOwers) {
+                if (bo.memberId == b.payerId) continue
+                val share = b.amount / nbOwerShares * (membersWeight[bo.memberId] ?: 0.0)
+                val row = owed.getOrPut(bo.memberId) { HashMap() }
+                row[b.payerId] = (row[b.payerId] ?: 0.0) + share
+            }
+        }
+
+        val results: MutableList<Transaction> = ArrayList()
+        for (debtor in members) {
+            for (creditor in members) {
+                if (debtor.id == creditor.id) continue
+                val net = (owed[debtor.id]?.get(creditor.id) ?: 0.0) -
+                        (owed[creditor.id]?.get(debtor.id) ?: 0.0)
+                if (round2(net) > 0.0) {
+                    results.add(Transaction(debtor.id, creditor.id, round2(net)))
+                }
+            }
+        }
+        return results
+    }
 
     @JvmStatic
     fun settleBills(

app/src/main/res/values-af-rZA/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ar-rSA/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ca-rES/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-cs-rCZ/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-da-rDK/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-de-rDE/strings.xml

@@ -138,8 +138,6 @@
     <string name="settings_color_custom">Eigene Farbe</string>
     <string name="settings_color_mode">Farbauswahl</string>
     <string name="settings_show_archived">Archivierte Projekte anzeigen</string>
-    <string name="settings_fill_new_bill_from_last">Aus letzter Rechnung vorausfüllen</string>
-    <string name="settings_fill_new_bill_from_last_summary">Zahler, Kategorie, Zahlungsart und Beteiligte aus der zuletzt erstellten Rechnung des Projekts übernehmen.</string>
     <string name="pref_value_sync_1h">1 Stunde</string>
     <string name="pref_value_sync_1d">1 Tag</string>
     <string name="settings_url_warn_http">WARNUNG: \"http\" ist unsicher. Verwende \"https\".</string>
@@ -209,6 +207,7 @@
 
     <!-- Settlement -->
     <string name="center_none">Keine (optimal)</string>
+    <string name="center_none_direct">Keine (direkt)</string>
     <string name="settle_who">Wer zahlt</string>
     <string name="settle_to_whom">An wen</string>
     <string name="settle_how_much">Betrag</string>

app/src/main/res/values-el-rGR/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-es-rES/strings.xml

@@ -137,8 +137,6 @@
     <string name="settings_color_custom">Color personalizado</string>
     <string name="settings_color_mode">Selección de color</string>
     <string name="settings_show_archived">Mostrar los proyectos archivados</string>
-    <string name="settings_fill_new_bill_from_last">Rellenar desde la última factura</string>
-    <string name="settings_fill_new_bill_from_last_summary">Reutilizar el pagador, la categoría, el modo y los participantes de la última factura creada en el proyecto.</string>
     <string name="pref_value_sync_1h">1 hora</string>
     <string name="pref_value_sync_1d">1 día</string>
     <string name="settings_url_warn_http">ADVERTENCIA: \"http\" no es seguro. Usa \"https\".</string>
@@ -210,6 +208,7 @@
 
     <!-- Settlement -->
     <string name="center_none">Ninguno (óptimo)</string>
+    <string name="center_none_direct">Ninguno (directo)</string>
     <string name="settle_who">Quién paga</string>
     <string name="settle_to_whom">A quién</string>
     <string name="settle_how_much">Importe</string>

app/src/main/res/values-fi-rFI/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-fr-rFR/strings.xml

@@ -138,8 +138,6 @@
     <string name="settings_color_custom">Couleur personnalisée</string>
     <string name="settings_color_mode">Sélection de la couleur</string>
     <string name="settings_show_archived">Afficher les projets archivés</string>
-    <string name="settings_fill_new_bill_from_last">Pré-remplir depuis la dernière facture</string>
-    <string name="settings_fill_new_bill_from_last_summary">Reprendre le payeur, la catégorie, le mode et les participants de la dernière facture créée dans le projet.</string>
     <string name="pref_value_sync_1h">1 heure</string>
     <string name="pref_value_sync_1d">1 jour</string>
     <string name="settings_url_warn_http">AVERTISSEMENT : \"http\" n\'est pas sûr. Utilisez \"https\".</string>
@@ -213,6 +211,7 @@
 
     <!-- Settlement -->
     <string name="center_none">Aucun (optimal)</string>
+    <string name="center_none_direct">Aucun (direct)</string>
     <string name="settle_who">Qui paie</string>
     <string name="settle_to_whom">À qui</string>
     <string name="settle_how_much">Montant</string>

app/src/main/res/values-hu-rHU/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-it-rIT/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-iw-rIL/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ja-rJP/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ko-rKR/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-nl-rNL/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-no-rNO/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pl-rPL/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pt-rBR/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ro-rRO/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ru-rRU/strings.xml

@@ -137,8 +137,6 @@
     <string name="settings_color_custom">Пользовательский цвет</string>
     <string name="settings_color_mode">Выбор цвета</string>
     <string name="settings_show_archived">Показывать заархивированные проекты</string>
-    <string name="settings_fill_new_bill_from_last">Автозаполнение на основе последнего расхода</string>
-    <string name="settings_fill_new_bill_from_last_summary">Предварительное заполнение полей "Плательщик", "Категория", "Способ оплаты" и "Для кого" на основе последнего расхода, созданного в проекте.</string>
     <string name="pref_value_sync_1h">1 час</string>
     <string name="pref_value_sync_1d">1 день</string>
     <string name="settings_url_warn_http">ПРЕДУПРЕЖДЕНИЕ: "http" небезопасен. Используйте "https".</string>
@@ -209,6 +207,7 @@
 
     <!-- Settlement -->
     <string name="center_none">Нет (оптимально)</string>
+    <string name="center_none_direct">Нет (напрямую)</string>
     <string name="settle_who">Кто платит</string>
     <string name="settle_to_whom">Кому</string>
     <string name="settle_how_much">Сумма</string>

app/src/main/res/values-sr-rSP/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-sv-rSE/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-tr-rTR/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-uk-rUA/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-vi-rVN/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-zh-rCN/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-zh-rTW/strings.xml

@@ -144,8 +144,6 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values/strings.xml

@@ -146,12 +146,20 @@
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
     <string name="settings_extra_features">Extra Features</string>
-    <string name="settings_extra_features_summary">Experimental and advanced settings. Use at your own risk.</string>
+    <string name="settings_extra_features_summary">Experimental and advanced options.</string>
-    <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
+    <string name="prefill_button">Pre-fill</string>
-    <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
+    <string name="prefill_mode_off">Nothing</string>
+    <string name="prefill_mode_latest_project">Last from project</string>
+    <string name="prefill_mode_latest_device">Last from device</string>
+    <string name="prefill_mode_preset">Saved preset</string>
+    <string name="prefill_mode_preset_empty">None saved yet</string>
+    <string name="prefill_save_preset">Save current as preset</string>
+    <string name="prefill_preset_saved">Preset saved for this project</string>
     <string name="settings_stats_include_deactivated">Include deactivated members in stats</string>
+    <string name="settings_auto_categorize">Auto-categorize new bills</string>
+    <string name="settings_auto_categorize_summary">Pick the category from similar past bills.</string>
     <string name="settings_full_sync_delay">Full sync delay</string>
-    <string name="settings_full_sync_delay_summary">How long a pull-to-refresh waits between two full syncs. In between, it only fetches what changed, which is much faster.</string>
+    <string name="settings_full_sync_delay_summary">Time between full syncs. Other refreshes only fetch changes.</string>
     <string name="pref_value_sync_always">Always</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
@@ -178,6 +186,7 @@
     <string name="pref_key_show_archived" translatable="false">showArchived</string>
     <string name="pref_key_extra_features" translatable="false">betaFeatures</string>
     <string name="pref_key_stats_include_deactivated" translatable="false">statsIncludeDeactivated</string>
+    <string name="pref_key_auto_categorize" translatable="false">autoCategorizeNewBills</string>
     <string name="pref_key_full_sync_delay" translatable="false">fullSyncDelayMinutes</string>
     <string name="pref_key_last_account_sync_timestamp" translatable="false">lastAccountSyncTimestamp</string>
     <string name="pref_key_fill_new_bill_from_last" translatable="false">fillNewBillFromLast</string>
@@ -247,6 +256,7 @@
 
     <!-- Settlement -->
     <string name="center_none">None (Optimal)</string>
+    <string name="center_none_direct">None (Direct)</string>
     <string name="settle_who">Who pays</string>
     <string name="settle_to_whom">To whom</string>
     <string name="settle_how_much">Amount</string>