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Chronal vs Tuning fork: catalog facts
Chronal	Tuning fork
Free Free and open source, with no ads.	Free Free and open source under the MIT licence.
Android	Android
Notation editor for hearing written rhythms Two synchronised metronomes for polyrhythms	Plays a reference tone on demand Simple and focused on tuning by ear
Android only Licence information differs between the repository and the F-Droid listing	No visual pitch detection like a chromatic tuner
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account 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 Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.