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Chronal vs Salmon: catalog facts
Chronal	Salmon
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	Works fully offline on the device No accounts, adverts or subscriptions
Android only Licence information differs between the repository and the F-Droid listing	Young project with a small user base Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	No account needed
Not stated if it works offline	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.