What’s new
• The screen time card on the Since charge page now has its own title instead of reusing "Screen time today"
• The APK no longer embeds Google's encrypted dependency-info block, enabling F-Droid reproducible builds
Quick answer
System monitor widget with per-app usage insights and a charging screensaver
F-Droid repository metadata
Device Watch is an Android device monitor with a home-screen widget, per-app usage insights and an interactive screensaver for charging or docked use. It works completely offline: the app has no internet permission, and every number is real data read from Android and kernel sources — when a value is not available with the permissions granted, the app shows a dash instead of a fabricated value.
Features:
* Home-screen widget: battery, memory, CPU, storage, Wi-Fi, mobile network, data usage, uptime, today's screen time and last update time * Data counters per calendar day or per one-month billing cycle with a configurable start day * Tabbed dashboard: Overview (live battery ring, usage counters, system meters), Apps (usage insights), Device (hardware, SIM and Wi-Fi details) and Settings * Screen-time donut of your most-used apps, top data consumers and a last-opened list with per-app uninstall * Usage counters with a private 62-day daily history kept on the device: screen time, unlocks, filtered notification count, restarts and charging sessions * On-device notification log with 7-day retention * Since-charge view: elapsed time, battery drop, average drain and per-app screen time since the battery was last charged full or unplugged * Interactive screensaver with a large clock, next alarm, charging power in watts, battery-tinted background, optional night dimming and a battery-full notification
All statistics stay on the device. Nothing is uploaded anywhere.
Screenshots
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
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