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Endel vs Metiq: catalog facts
Endel	Metiq
Paid Offered with a trial; see the site for current subscription prices.	Free Free and open source under the GPL.
Windows, Android, iOS	Android
Sound adapts to time, weather, heart rate and location Separate modes for focus, relaxation, sleep and activity	Several noise colors plus binaural beats and ambient sounds Very simple tap-and-listen interface
Effectiveness claims come largely from the company's own research Closed source commercial service	Android only No releases published on GitHub; install through F-Droid
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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.