Sleep Timer
Sleep Timer is a free, open-source fitness and health app for Android. Simplest Sleep Timer. It has 188 GitHub stars and is released under the Apache-2.0 license, and you can install it from F-Droid and Google Play.
github.com/SimonMarquis/SleepTimer (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About Sleep Timer
Sleep Timer helps you fall asleep while listening to music or podcasts. When the timer stops, audio playback is gradually lowered then paused. 1. Add the Tile in the Quick Settings panel. 2. Tap the Tile to start a timer. 3. Extend, reduce or cancel the timer with the notification actions. Note: Don't look for a launcher icon, this app only provides a Quick Settings Tile.
Privacy and F-Droid
F-Droid builds Sleep Timer from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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Is Sleep Timer free and open source?
Yes. Sleep Timer's source code is public on GitHub under the Apache-2.0 license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install Sleep Timer?
You can install Sleep Timer from F-Droid (package fr.smarquis.sleeptimer) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: 1.6.3).
Is Sleep Timer still maintained?
The repository's most recent commit was on Oct 22, 2026. Its F-Droid listing was last updated on Jul 4, 2026. appsgit only lists apps whose repository had a commit in the last six months.