Green noise for sleep, study, and focus.
Green noise sits in the middle of the sound spectrum, fuller than white, softer than brown. Moss makes it live on your iPhone, so it never loops or clicks. One dark screen, one button. Press play and drift off.
Free download · iOS 17+
Green noise, and the whole spectrum.
Canopy, the free texture, is classic green noise. Moss+ opens the rest of the spectrum: deep brown, bright pink, and a soft, refined white. Every one is synthesized live and tuned by ear.
For the last hour of the day.
Moss is made for the moment you can barely stay awake, and for the desk hours before it.
All sound is generated in real time. No files, no loop seams, no clicks. It can play all night without repeating.
Sound fades out slowly, so there's no jolt if you're still half awake.
The screen is near-black and brightness is rationed. Nothing glows bright enough to hurt at night.
Lock your phone or switch apps and Moss carries on, with lock-screen and Control Center support.
See what's playing and the timer countdown at a glance, without waking the screen.
“I haven’t found another app on the store as beautiful, elegant, and simple to use, especially one that generates the noise rather than playing back files. The green noise has improved my focus at work tenfold.”
The free tier is a real app.
- Canopy, the classic green noise
- Sleep timer with gentle fade
- Background playback
- Nothing to set up or sign in to
- Everything in free
- Riverbed, Rainfall & Mist textures
- Warm ↔ bright tone shaping
- Dynamic Island Live Activity
- Six app icons to choose from
Private by design.
All sound is generated on your device, and your settings stay on it. The details live in the privacy policy, which is mercifully short.