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Metiq vs Ambio: catalog facts
Metiq	Ambio
Free Free and open source under the GPL.	Free Free and open source under the MIT licence.
Android	Android
Several noise colors plus binaural beats and ambient sounds Very simple tap-and-listen interface	Mix up to three ambient sounds with separate volume levels Pomodoro presets built in
Android only No releases published on GitHub; install through F-Droid	Android only Sound library limited to twelve sounds
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	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.