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Chroma Doze vs Sleep Noise: catalog facts
Chroma Doze	Sleep Noise
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the MIT license.
Android	Android
Draw any noise spectrum by hand Fast feedback while adjusting	Generates four types of background noise on the device Includes a sleep timer with gradual fade-out
Android only Infrequent updates	Android only The interface has no light mode
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: MIT
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 8, 2026

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