How One Developer Built a Location-Aware Phone Silencer Using Android Geofencing

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A developer created an app called Muffle after repeatedly forgetting to silence his phone at inconvenient moments, including during prayer. The app uses Android's GeofencingClient to automatically switch sound profiles based on the user's physical location, removing the need for manual toggling. A key technical challenge was balancing location accuracy against battery drain, as forcing high-precision updates caused excessive power consumption. To prevent erratic profile switching when a user lingers near a geofence boundary, the developer added a 60-second time-gate that filters out rapid, repeated state changes. The project highlights how aggressive battery management policies from device manufacturers can interfere with even official Android location APIs.

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