Murmo: Sound Machine
Rain and white noise for sleep
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Rain, ocean waves or a box fan all night, with a sleep timer that fades out. For the nursery, the night shift and anyone who sleeps better with sound.
Rain, ocean waves, a box fan or brown noise, playing all night on your iPhone. Every sound starts at a random point and drifts a little as it plays, so there is no loop to catch at 3 a.m.
Pick a preset, set a sleep timer and put the phone down. When the timer runs out, the sound fades instead of cutting off. There is no subscription. You don't make an account, and there are no ads.
In a baby's room, save the nursery's mix once and it is the same every night. It keeps playing with the screen locked, and you can pause it from the Lock Screen, from Control Center or by saying "Siri, pause Murmo." Favorites play from a Home Screen widget.
Brown Noise or Box Fan gives a loud room one steady sound over the street or the neighbors.
If you keep noise on for tinnitus, White Noise, Pink Noise and Brown Noise are made fresh as they play, so there is no loop in them at all.
After a night shift, put on a sound for the daylight hours and set a wake alarm for the afternoon. The alarm rings at its time even with the app closed. Nightstand turns the screen into a dim clock with big buttons.
On a flight or in a hotel room, eight presets play with no connection from the first launch. The others download their sounds the first time you play them and keep them. In the day, Coffee Shop and Deep Focus are there for work and reading.
Every preset has one dial. On Thunderstorm it makes the rain heavier and brings the thunder closer. Open Mix to change any sound or add another, and save it as your mix. Share any preset as a link, and it opens in the app or on a web page.
From bed, say "Siri, play thunderstorm sounds on Murmo." If you use iCloud, your presets and settings follow you to your other devices.
The rain, the ocean, the fire and the fan are recordings of the real thing. There are 21 presets, most of them a few sounds already balanced for you.
- Thunderstorm, Gentle Rain and Rain on a Tin Roof
- Ocean Night, Lakeside and Mountain Stream
- Forest Night and Windy Night
- Cozy Cabin, Campfire and Heartbeat Hush
- White Noise, Pink Noise, Brown Noise and Box Fan
- Train Sleeper and Flight
- Coffee Shop and Deep Focus
- Sunrise Birds and Jungle Dawn, for waking up
You can also make your own mix from 29 sounds.
- Steady Rain, Heavy Rain, Rain on a Tin Roof, Rain on a Window, Thunder and Wind
- Ocean Waves, Distant Surf, Lake Shore, Stream and Waterfall
- Crickets, Frogs, Owl, Dawn Birds and Cat Purring
- Campfire, Fireplace, Heartbeat, Coffee Shop, Train Interior and Airplane Cabin
- Box Fan, AC Hum, White Noise, Pink Noise and Brown Noise
- Binaural Beat and Isochronic Pulse
Murmo doesn't track you. If something doesn't work, you can tell us from inside the app.
- Share any preset as a link. Friends with Murmo open it in the app, and everyone else sees the mix on a web page.
- Home shows White, Pink and Brown Noise under the top card at first, then the presets you played last.
- Hold a favorite and drag it onto another card to move it.
- Box Fan, Airplane Cabin, Wind and Distant Surf are real recordings now, and Cat Purring runs longer.
- A car or speaker that presses Play as it connects no longer starts the sound. To keep the old way, turn on Play when a car or speaker connects in Settings › Playback.
- With Advanced controls on, backups are Murmo Backup files you can open from Files.
- On an opened iPhone Duo, your presets and the player sit side by side.
- Fixes for shared links.
- Small fixes: the Edited mark on the player title is centered, and the tip about holding a card now says you can drag a favorite to move it.
- Share links are short now. Without a connection the mix travels inside the link; a link lasts until it goes 90 days without being opened.
- Fixed a crash in the Live Activity on iPhones with a Dynamic Island after a sleep timer ran out.
The developer, HerronDev, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HerronDev LLC
- Size
- 31.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.1 or later.
- iPhone
Requires iOS 26.1 or later. - Mac
Requires macOS 26.1 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.1 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 HerronDev LLC
