White, pink, brown, fan, rain, and slow surf sounds are generated on device with no bundled recording library.
DriftNoise
Offline sleep and focus sounds, on device.



Offline sleep and focus sounds without an account, cloud library, or subscription. Pick a tone, shape the texture, and let the timer fade it out on iPhone.
DriftNoise stays deliberately small: procedural audio, a readable mixer, presets, timer controls, and local settings. No login wall, no streaming dependency, no oversized content library.
Adjust volume, warmth, and movement so the sound sits behind sleep, reading, writing, or deep work.
Set a sleep timer and let DriftNoise taper down gently instead of stopping abruptly.
Core playback, presets, timer, background audio, and settings work locally after install.
Fast enough to use in the moment.
The app is designed around repeat use: open it, make the local calculation or plan, save the result, and get back to the work.
Pick a sound
Choose white, pink, brown, fan, rain, or surf-style noise from the local library.
Shape the texture
Tune volume, warmth, and movement so the sound fits the room you are in.
Set the fade
Use a sleep timer and gentle fade-out before locking the phone for the night.
Focused jobs, no login detour.
Wait for the App Store, or buy the source today.
DriftNoise is in TestFlight. The full Swift source is available now on the marketplace — fork it, ship it under your own bundle ID, relicense it. Or wait for the public App Store release.