Compare software

Stims vs Caff: catalog facts
Stims	Caff
Best for: Android users who want selected apps to keep the screen on	Best for: Android users who need to keep the display awake temporarily
Free Free and open source under GPL-3.0.	Free Free and open source under the BSD 2-Clause license.
Android	Android
Keeps the display awake only for selected apps Designed to handle aggressive device power managers	Quick settings tile toggles screen-on mode Cycles through preset or custom durations All 3 strengths for Caff Quick settings tile toggles screen-on mode Cycles through preset or custom durations Includes an unlimited duration option
Requires Usage Access permission Samsung One UI requires display-over-other-apps permission	Requires Android 8 or later Android 12 and later may require disabling battery optimization
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: BSD-2-Clause
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Stims github.com/acidburnmonkey/stims Catalog checked October 8, 2026	Official website Full listing and sources Sources for Caff github.com/goll72/caff Catalog checked October 8, 2026

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