# Chronal (open-source education app)

> 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.

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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/cognitivitydev/Chronal |
| Platforms | Android |
| Built with | Kotlin |
| GitHub stars | 109 |
| License | CC0-1.0 (open source) |
| F-Droid | https://f-droid.org/packages/dev.cognitivity.chronal/ (package dev.cognitivity.chronal) |
| F-Droid anti-features | none flagged |
| Google Play | https://play.google.com/store/apps/details?id=dev.cognitivity.chronal |
| App Store | not linked |
| Website | none listed |
| Official | no |
| Category | Education & language |
| Latest release | v1.1.3 (Jul 17, 2026) |
| Last commit | Aug 5, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

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