White Noise & Sleep Sounds
A 3-channel ambient sound mixer for sleep and focus — 11 free sounds, no paywall.
About
White Noise & Sleep Sounds is an Android app that helps you relax, focus, or fall asleep with ambient sound mixes. It plays up to three sounds simultaneously with per-sound volume and intensity, keeps audio going from a media-playback foreground service so it survives backgrounding and the lock screen, and ships with home-screen widget and MediaSession controls. As of v1.10.0 every sound is free — the premium pack has been retired.
Features
- 11 free sounds organized into three categories: nature (Rain, Waves, Wind, Thunder, Fireplace, Birds, Crickets), city (Cafe, Fan), and sleep (White Noise, Pink Noise)
- 9 sounds are CC0 Freesound recordings; the two noise channels are algorithmically generated and shipped as 30-second 16-bit PCM WAV
- Multi-sound mixer: play up to 3 sounds simultaneously with individual volume control
- Sound intensity slider on 7 channels — live-weights the effective volume (
volume × (0.4 + 0.6 × intensity)) - Preset save / load — store named mixes (up to 20)
- Sleep timer with natural fade-out (0 / 15 / 30 / 60 seconds) and optional loop-after-timer
- Media-playback foreground service keeps audio running when the app is backgrounded or the screen is locked
- MediaSession lock-screen and Bluetooth headset Play/Pause controls
- Home screen Glance app widget
- Playback statistics (daily and per-sound, 7-day / 30-day views) stored locally in Room
- AdMob adaptive banner ad + App Open ad; one-time in-app purchase to remove ads (
remove_ads) - Seven UI languages: English, Korean, Japanese, Simplified Chinese, Spanish, French, German
- Fully offline core — no account, no cloud sync, no upload of sound mix state