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