AlertSpot: An open‑source, battery‑friendly transit alarm for Android

Описание и применение

AlertSpot – это бесплатное, открытое приложение для Android, которое предупреждает о приближении к заданной точке с помощью геозоны, экономя батарею и не собирая данные о местоположении.

Задача

Commuters often miss stops because they fall asleep or are distracted, yet existing location‑based reminder apps drain battery, require cloud accounts, or track telemetry.

Результат

AlertSpot delivers a battery‑efficient, privacy‑first transit alarm that reliably triggers on geofence entry without cloud dependencies, achieving high usability for commuters.

Рабочий процесс

• 1. Install AlertSpot from GitHub or APK release.
• 2. Open the app and use the map to drop pins or search for a destination.
• 3. Set a custom radius (meters or kilometers) for the geofence.
• 4. The app caches OSM tiles locally for offline map use.
• 5. AlertSpot runs a foreground service with a persistent notification.
• 6. It polls location adaptively: low frequency when far, higher when approaching.
• 7. When within the geofence, a full‑screen intent with looping audio and vibration wakes the device.
• 8. The app re‑registers geofences after device reboot via BOOT_COMPLETED intent.

Доказательства

AlertSpot is a lightweight, completely free, and open‑source Android app that fires high‑priority audio and full‑screen alerts when you enter a destination geofence.

Источник

It caches up to 600 MB of OpenStreetMap tiles locally so maps load reliably even with unstable transit mobile data.

Источник

Runs a continuous foreground service with persistent notification status.

Источник