TimeR Machine
TimeR Machine is a free, open-source fitness and health app for Android. A highly customizable interval timer. It has 370 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
github.com/timer-machine/timer-machine-android (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 TimeR Machine
TimeR Machine is a free interval timer for not just workout and exercise, but also any situations you need to construct personalized, multi-stage timer plans. It's highly customizable and able to create almost whatever kind of timer you need. Suitable for all kinds of activities, including: - HIIT (High-Intensity Interval Training) workout - Tabata workout - Gym workout - Run, jog, walk exercise - Other sports workouts like cycling, running, stretching, boxing, MMA, circuit training, at-home bodyweight training workouts, cross fit, weightlifting, yoga...
Privacy and F-Droid
F-Droid builds TimeR Machine 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 TimeR Machine free and open source?
Yes. TimeR Machine's source code is public on GitHub under the GPL-3.0-only 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 TimeR Machine?
You can install TimeR Machine from F-Droid (package io.github.deweyreed.timer.other) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: 7.8.0).
Is TimeR Machine still maintained?
The repository's most recent commit was on Sep 12, 2026. Its F-Droid listing was last updated on Sep 16, 2025. appsgit only lists apps whose repository had a commit in the last six months.