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Ambio vs Drift: catalog facts
Ambio	Drift
Free Free and open source under the MIT licence.	Free Free and open source, with no ads.
Android	Android
Mix up to three ambient sounds with separate volume levels Pomodoro presets built in	Independent volume for each sound layer Sleep timer that fades audio out
Android only Sound library limited to twelve sounds	Android only Limited to the bundled sound library
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
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.