Compare software

Traffic Light vs Device Watch: catalog facts
Traffic Light	Device Watch
Best for: Android users monitoring their data usage privately	Best for: Android users who want device and app usage statistics without any network access
Free Free and open source under the MIT license.	Free Free and open source under GPL-3.0-or-later.
Android	Android
Requests few permissions No tracking All 3 strengths for Traffic Light Requests few permissions No tracking Low battery use	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
Android only Little public documentation of its feature set	Android only Small project with no tagged releases on GitHub
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
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	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

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