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Tuning fork vs Salmon: catalog facts
Tuning fork	Salmon
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Android	Android
Plays a reference tone on demand Simple and focused on tuning by ear	Works fully offline on the device No accounts, adverts or subscriptions
No visual pitch detection like a chromatic tuner	Young project with a small user base Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is 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.