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Drift vs Blanket: catalog facts
Drift	Blanket
Free Free and open source, with no ads.	Free Free and open source under the GPL.
Android	Linux
Independent volume for each sound layer Sleep timer that fades audio out	Built-in set of nature, city and noise sounds Saveable presets and custom sounds
Android only Limited to the bundled sound library	Linux only No timer or scheduling described
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
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 1, 2026

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