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Drift vs Endel: catalog facts
Drift	Endel
Free Free and open source, with no ads.	Paid Offered with a trial; see the site for current subscription prices.
Android	Windows, Android, iOS
Independent volume for each sound layer Sleep timer that fades audio out	Sound adapts to time, weather, heart rate and location Separate modes for focus, relaxation, sleep and activity
Android only Limited to the bundled sound library	Effectiveness claims come largely from the company's own research Closed source commercial service
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
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.