Build a production-grade Flutter BLE beacon proximity app with Android 12–14 permissions, iOS authorization, ranging code, and distance smoothing.
Add custom notification sounds to Flutter apps on Android and iOS with channels, file placement, FCM payloads, and testing tips.
Step-by-step Flutter Sign in with Apple: iOS/macOS setup, Android web flow, secure nonce, Firebase integration, testing, and troubleshooting.
Build a Flutter app that reads and writes fitness data via Apple HealthKit and Android Health Connect—permissions, code samples, sync, and best practices.
Implement reliable periodic background sync in Flutter using workmanager: setup, code samples, iOS/Android nuances, constraints, retries, and best practices.
Build a robust, web-safe Flutter device info layer using device_info_plus, platform checks, screen metrics, caching, and privacy best practices.
