Your flip case has no magnet, so your phone does not lock when you close it. FlipLock detects the flap from the ambient light sensor and locks the screen. No magnet, no root, no ADB, no Internet. Android 9+.
android kotlin privacy foss samsung android-app galaxy light-sensor lock-screen screen-off ambient-light-sensor accessibility-service hall-sensor jetpack-compose no-tracking one-ui flip-cover flip-case wallet-case smart-cover
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Updated
Aug 9, 2026 - Kotlin