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Developer Builds Battery-Friendly Android App That Auto-Silences Phone by Location

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A developer created an Android app called Muffle after being embarrassed by his phone ringing during a mosque sermon, highlighting the recurring problem of manual Do Not Disturb management. The app uses Google Play Services' GeofencingClient API instead of continuous GPS polling, allowing the system to monitor location boundaries efficiently using cell towers and Wi-Fi rather than raw GPS. When a user crosses a defined geographic boundary, the system fires a PendingIntent that wakes the app only as needed, avoiding persistent background battery drain. A BroadcastReceiver listening for device reboots automatically re-registers geofences, keeping rules active without user intervention. A priority queue handles overlapping triggers by enforcing the strictest sound profile, though Android's Doze mode and manufacturer-specific battery optimizations proved to be the most unpredictable challenges during development.

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Developer Builds Battery-Friendly Android App That Auto-Silences Phone by Location · ShortSingh