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Sleep Noise vs Noise Timer: catalog facts
Sleep Noise	Noise Timer
Free Free and open source under the MIT license.	Free Free and open source under the MIT license.
Android	Android
Generates four types of background noise on the device Includes a sleep timer with gradual fade-out	Generates noise in real time rather than looping recordings Offers preset and custom sleep timers
Android only The interface has no light mode	Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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