Chronal
Chronal is a free, open-source education app for Android. Clean metronome & tuner with polyrhythms and notation editor. It has 109 GitHub stars and is released under the CC0-1.0 license, and you can install it from F-Droid and Google Play.
- Android
- Kotlin
- Education & language
- Actively maintained
About Chronal
Chronal is a powerful, ad-free metronome and tuner built for musicians of all levels. Practice, rehearse, and perform with precise timing, advanced rhythm tools, and a chromatic tuner, all in one app. Metronome Features • Notation editor: Hear the rhythm that you see on the page. • Multiple synchronized metronomes: Layer independent rhythms for polyrhythms and advanced practice. • Beat & subdivision visualization: Clear visual indicators for beats and subdivisions. • Fullscreen mode: Focus on your music with large, easy-to-see visuals from a distance. • Conductor mode: Follow a visual conducting path to internalize timing.
Privacy and F-Droid
F-Droid builds Chronal 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.
Similar apps
More open-source education apps
AnkiDroid
ankidroid/Anki-Android
Memorize anything with AnkiDroid!
OfficialEducation & languageAndroidRTranslator
niedev/RTranslator
Open source real-time translation app for Android that runs locally.
Education & languageAndroidWikipedia for iOS
wikimedia/wikipedia-ios
The official Wikipedia iOS app.
OfficialEducation & languageiOS
Wikipedia
wikimedia/apps-android-wikipedia
The official app for Wikipedia, the world’s largest source of information.
OfficialEducation & languageAndroid
BOINC
BOINC/boinc
Use your device to advance scientific research.
Education & languageAndroid
PSLab
fossasia/pslab-app
Pocket Science Lab Android interface for PSLab hardware.
Education & languageAndroidiOS
What is Chronal?
Chronal is a free, open-source education app for Android. Clean metronome & tuner with polyrhythms and notation editor. It has 109 GitHub stars and is released under the CC0-1.0 license, and you can install it from F-Droid and Google Play.
Is Chronal free and open source?
Yes. Chronal's source code is public on GitHub under the CC0-1.0 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 Chronal?
You can install Chronal from F-Droid (package dev.cognitivity.chronal) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v1.1.3).
Is Chronal still maintained?
The repository's most recent commit was on Aug 5, 2026. Its F-Droid listing was last updated on Jul 19, 2026. appsgit only lists apps whose repository had a commit in the last six months.