Compare software

Device Watch vs Traffic Light: catalog facts
Device Watch	Traffic Light
Best for: Android users who want device and app usage statistics without any network access	Best for: Android users monitoring their data usage privately
Free Free and open source under GPL-3.0-or-later.	Free Free and open source under the MIT license.
Android	Android
No internet permission, so usage data stays on the device Home-screen widgets plus per-app screen time, data and notification stats All 4 strengths for Device Watch No internet permission, so usage data stays on the device Home-screen widgets plus per-app screen time, data and notification stats Screensaver mode for charging or docked use Actively developed	Requests few permissions No tracking All 3 strengths for Traffic Light Requests few permissions No tracking Low battery use
Android only Small project with no tagged releases on GitHub	Android only Little public documentation of its feature set
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for Device Watch github.com/jrs8205/Device-Watch f-droid.org/packages/org.jarsi.devicewatch Catalog checked October 2, 2026	Official website Full listing and sources Sources for Traffic Light github.com/leekleak/traffic-light f-droid.org/packages/com.leekleak.trafficlight Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.