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Raumo, for writers.

Raumo is an iPhone app that composes ambient music live on the device as you listen, in a spatial room you shape. It uses no generative AI, works offline and has no account.

Everything here may be used to write about Raumo. Raumo for iPhone is not yet on the App Store.

Updated 18 October 2026

Descriptions

One line

Raumo writes ambient music on your iPhone as you listen, never the same twice.

Short

Raumo writes ambient music on your iPhone as you listen, never the same twice. Soundscapes for sleep, focus and unwind in a spatial room you shape. Offline, no account.

Long

Raumo is an iPhone app that composes ambient music live, on the device, while you listen. Its rule-based composer writes harmony, melody, rhythm and form as the music plays, so each performance is new. It uses no generative AI and needs no internet connection to play.

There are 96 authored soundscapes in 6 worlds and endless playlists for Sleep, Focus, Unwind and Daydream. Every sound sits in a spatial room around the listener: bring one closer and it becomes louder, choose one of 5 Places for the whole room, or shape its Mood. A moment you like can be kept exactly as it played.

Raumo has no account, no advertising and no third-party analytics. Its artwork is procedural, drawn by code.

Fact sheet

Name	Raumo
What it is	Generative ambient music app
Platform	iPhone, iOS 17 or later
Language	English
Availability	Raumo for iPhone is not yet on the App Store.
Account	None
Website	raumo.app
Video	YouTube @raumoapp

Facts

Raumo is an iPhone app that composes ambient music live on the device while you listen. Each track is written once and never repeats.
The composition is rule-based and runs on the iPhone. Raumo uses no generative AI and no online inference, and its artwork is procedural, not photographs or AI imagery.
Its instruments are synthesised with ports of Mutable Instruments Elements and Plaits, alongside sampled instruments, licensed CC0 field recordings and recorded drum loops.
Raumo has 12 endless playlists (Drift, Flow, Unwind, Sleep, Daydream, Catalog, Nature, Binaural, Noise & Tape, Music & Nature, Haze, Handpan) and 96 authored soundscapes in 6 worlds (Hush, Flow, Clarity, Warmth, Glow, Orbit).
Four moods guide listening: Sleep, Focus, Unwind and Daydream.
Every sound sits in a spatial room around the listener, rendered with Apple’s HRTF spatial audio. Bringing a sound closer makes it louder; with headphones that report their movement, head tracking keeps the room in place.
Six Mood controls (Night, Wide, Song, Awake, Wind and Colour) and 5 Places (Glass chamber, Great hall, Stone church, Starry sky, Fog) shape the whole soundscape.
Nature recordings, white, pink and brown noise, tape textures and binaural tones are optional sounds of the room. Raumo makes no health, sleep or attention claims about any of them.
A sleep timer (15 to 90 minutes, or a custom length) brings a session to a gentle close, with a Live Activity on the Lock Screen and in the Dynamic Island.
Widgets, Control Center controls, Siri and Shortcuts can start Raumo without opening it.
Any track can be kept exactly as it played: Raumo stores its musical recipe and composes it again.
Listening works offline: the music is composed on the iPhone with sounds included in the app. Only iCloud sync of kept items and sharing a link go online.
There is no account, no advertising and no third-party analytics. What Raumo learns about your taste stays on your iPhone.
Raumo needs an iPhone with iOS 17 or later and is in English.

Raumo makes no health claims: it does not promise better sleep, focus, relaxation or any effect of a sound or tone. Please do not attribute such claims to it.

Icon and artwork

Raumo’s artwork is original and procedural, rendered by code in the app. It contains no photographs and no AI imagery. Each world has its own picture.

App screens

Screens from Raumo 1.0, captured in the iOS Simulator for the App Store set. Favourites and the profile show the app’s demo state, not real listening.

Recorded examples

Each example is a recording of Raumo’s audio engine, rendered offline from the app’s own audio code at version 1.0 so it can be heard on the web. Please describe them as recordings: in the app, the music is composed live and never plays the same way twice. Sources and licences of the sounds they contain are in the audio credits.