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Endel vs Blankie: catalog facts
Endel	Blankie
Paid Offered with a trial; see the site for current subscription prices.	Free Free and open source with no ads or subscriptions.
Windows, Android, iOS	macOS, iOS
Sound adapts to time, weather, heart rate and location Separate modes for focus, relaxation, sleep and activity	24 built-in sounds plus your own audio files Saved presets for different mixes
Effectiveness claims come largely from the company's own research Closed source commercial service	Apple platforms only Not a general music player
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
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 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.