feat: add automatic weight sync from Apple Health and Google Health Connect

android/app/build.gradle

@@ -39,7 +39,7 @@ android {
     defaultConfig {
         // Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "de.wger.flutter"
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 26
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName

android/app/src/main/AndroidManifest.xml

@@ -9,11 +9,20 @@
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.INTERNET" />
 
+    <!-- Health Connect permissions for weight sync -->
+    <uses-permission android:name="android.permission.health.READ_WEIGHT"/>
+    <uses-permission android:name="android.permission.health.READ_HEALTH_DATA_HISTORY"/>
+
     <queries>
         <intent>
             <action android:name="android.intent.action.VIEW" />
             <data android:scheme="https" />
         </intent>
+        <!-- Health Connect -->
+        <package android:name="com.google.android.apps.healthdata" />
+        <intent>
+            <action android:name="androidx.health.ACTION_SHOW_PERMISSIONS_RATIONALE" />
+        </intent>
     </queries>
 
     <supports-screens
@@ -48,8 +57,24 @@
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <!-- Health Connect permissions rationale -->
+            <intent-filter>
+                <action android:name="androidx.health.ACTION_SHOW_PERMISSIONS_RATIONALE" />
+            </intent-filter>
         </activity>
 
+        <!-- Required for Health Connect on Google Play -->
+        <activity-alias
+            android:name="ViewPermissionUsageActivity"
+            android:exported="true"
+            android:targetActivity=".MainActivity"
+            android:permission="android.permission.START_VIEW_PERMISSION_USAGE">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW_PERMISSION_USAGE" />
+                <category android:name="android.intent.category.HEALTH_PERMISSIONS" />
+            </intent-filter>
+        </activity-alias>
 
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->

android/app/src/main/kotlin/de/wger/flutter/MainActivity.kt

@@ -1,6 +1,6 @@
 package de.wger.flutter
 
-import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.android.FlutterFragmentActivity
 
-class MainActivity: FlutterActivity() {
+class MainActivity: FlutterFragmentActivity() {
 }

ios/Runner/Info.plist

@@ -26,6 +26,8 @@
 	<true/>
 	<key>NSCameraUsageDescription</key>
 	<string>Workout photos</string>
+	<key>NSHealthShareUsageDescription</key>
+	<string>wger uses your health data to automatically sync weight measurements from your smart scale</string>
 	<key>UIApplicationSceneManifest</key>
 	<dict>
 		<key>UIApplicationSupportsMultipleScenes</key>

ios/Runner/Runner.entitlements

@@ -4,5 +4,11 @@
 <dict>
 	<key>aps-environment</key>
 	<string>development</string>
+	<key>com.apple.developer.healthkit</key>
+	<true/>
+	<key>com.apple.developer.healthkit.access</key>
+	<array>
+		<string>health-records</string>
+	</array>
 </dict>
 </plist>

lib/database/exercises/exercise_database.dart

@@ -1,10 +1,6 @@
-import 'dart:io';
-
 import 'package:drift/drift.dart';
-import 'package:drift/native.dart';
+import 'package:drift_flutter/drift_flutter.dart';
 import 'package:logging/logging.dart';
-import 'package:path/path.dart' as p;
-import 'package:path_provider/path_provider.dart';
 import 'package:wger/database/exercises/type_converters.dart';
 import 'package:wger/models/exercises/category.dart';
 import 'package:wger/models/exercises/equipment.dart';
@@ -110,10 +106,6 @@ class ExerciseDatabase extends _$ExerciseDatabase {
   }
 }
 
-LazyDatabase _openConnection() {
-  return LazyDatabase(() async {
-    final dbFolder = await getApplicationCacheDirectory();
-    final file = File(p.join(dbFolder.path, 'exercises.sqlite'));
-    return NativeDatabase.createInBackground(file);
-  });
+QueryExecutor _openConnection() {
+  return driftDatabase(name: 'exercises');
 }

lib/database/ingredients/ingredients_database.dart

@@ -1,10 +1,6 @@
-import 'dart:io';
-
 import 'package:drift/drift.dart';
-import 'package:drift/native.dart';
+import 'package:drift_flutter/drift_flutter.dart';
 import 'package:logging/logging.dart';
-import 'package:path/path.dart' as p;
-import 'package:path_provider/path_provider.dart';
 
 part 'ingredients_database.g.dart';
 
@@ -63,10 +59,6 @@ class IngredientDatabase extends _$IngredientDatabase {
   }
 }
 
-LazyDatabase _openConnection() {
-  return LazyDatabase(() async {
-    final dbFolder = await getApplicationCacheDirectory();
-    final file = File(p.join(dbFolder.path, 'ingredients.sqlite'));
-    return NativeDatabase.createInBackground(file);
-  });
+QueryExecutor _openConnection() {
+  return driftDatabase(name: 'ingredients');
 }

lib/helpers/shared_preferences.dart

@@ -68,4 +68,30 @@ class PreferenceHelper {
       );
     }
   }
+
+  // Health sync
+  static const _healthSyncEnabledKey = 'healthSyncEnabled';
+  static const _lastHealthSyncTimestampKey = 'lastHealthSyncTimestamp';
+
+  Future<void> setHealthSyncEnabled(bool value) async {
+    await PreferenceHelper.asyncPref.setBool(_healthSyncEnabledKey, value);
+  }
+
+  Future<bool> getHealthSyncEnabled() async {
+    final value = await PreferenceHelper.asyncPref.getBool(_healthSyncEnabledKey);
+    return value ?? false;
+  }
+
+  Future<void> setLastHealthSyncTimestamp(String value) async {
+    await PreferenceHelper.asyncPref.setString(_lastHealthSyncTimestampKey, value);
+  }
+
+  Future<String?> getLastHealthSyncTimestamp() async {
+    return PreferenceHelper.asyncPref.getString(_lastHealthSyncTimestampKey);
+  }
+
+  Future<void> clearHealthSyncPreferences() async {
+    await PreferenceHelper.asyncPref.remove(_healthSyncEnabledKey);
+    await PreferenceHelper.asyncPref.remove(_lastHealthSyncTimestampKey);
+  }
 }

lib/l10n/app_en.arb

@@ -1180,5 +1180,26 @@
     }
   },
   "searchLanguageAll": "All languages",
-  "@searchLanguageAll": {}
+  "@searchLanguageAll": {},
+  "healthSync": "Health sync",
+  "@healthSync": {
+    "description": "Title for the health platform sync setting"
+  },
+  "healthSyncDescription": "Import weight from Apple Health or Health Connect",
+  "@healthSyncDescription": {
+    "description": "Subtitle for the health platform sync setting"
+  },
+  "healthSyncSuccess": "Synced {count} weight entries from Health",
+  "@healthSyncSuccess": {
+    "description": "Snackbar message after successful health sync",
+    "placeholders": {
+      "count": {
+        "type": "int"
+      }
+    }
+  },
+  "health": "Health",
+  "@health": {
+    "description": "Section header for health-related settings"
+  }
 }

lib/main.dart

@@ -119,6 +119,14 @@ void main() async {
 
   // Catch errors that happen outside of the Flutter framework (e.g., in async operations)
   PlatformDispatcher.instance.onError = (error, stack) {
+    // Skip the StackFrame assertion error from the stack_trace package.
+    // This is a known Flutter framework issue where async gap markers in stack
+    // traces cause an assertion failure in StackFrame.fromStackTraceLine.
+    if (error is AssertionError && error.toString().contains('asynchronous gap')) {
+      logger.warning('Suppressed StackFrame assertion error (known Flutter issue)');
+      return true;
+    }
+
     logger.severe('Error caught by PlatformDispatcher.instance.onError: $error');
     logger.severe('Stack trace: $stack');
 

lib/models/body_weight/weight_entry.dart

@@ -40,7 +40,7 @@ class WeightEntry {
     }
   }
 
-  WeightEntry copyWith({int? id, int? weight, DateTime? date}) => WeightEntry(
+  WeightEntry copyWith({int? id, num? weight, DateTime? date}) => WeightEntry(
     id: id,
     weight: weight ?? this.weight,
     date: date ?? this.date,

lib/providers/body_weight.dart

@@ -20,6 +20,7 @@ import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:wger/core/exceptions/http_exception.dart';
 import 'package:wger/helpers/consts.dart';
+import 'package:wger/helpers/date.dart';
 import 'package:wger/models/body_weight/weight_entry.dart';
 import 'package:wger/providers/base_provider.dart';
 
@@ -58,7 +59,9 @@ class BodyWeightProvider with ChangeNotifier {
 
   WeightEntry? findByDate(DateTime date) {
     try {
-      return _entries.firstWhere((plan) => plan.date == date);
+      return _entries.firstWhere(
+        (entry) => entry.date.isSameDayAs(date),
+      );
     } on StateError {
       return null;
     }