# Muon - Sleep & Focus Sounds — Spatial Audio Noise for Focus

> Spatial Audio Noise for Focus (iPhone/iPad app by 福顺 杨.)

- Source: https://appshunter.io/ios/app/muon-sleep-and-focus-sounds/id6766166811 (this page in markdown: same URL + `.md`)
- Developer: [福顺 杨](https://appshunter.io/developer/1564840056)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 442 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2026-05-07
- Data updated: 2026-06-14
- User reviews in markdown: https://appshunter.io/ios/app/muon-sleep-and-focus-sounds/id6766166811/reviews.md

## What is Muon?

Muon is a premium sleep and focus sound sanctuary, crafted with 
studio-grade DSP synthesis and real-world field recordings. No 
subscriptions, no ads, no accounts — one purchase and every sound 
is yours forever.


WHAT MAKES MUON DIFFERENT

• 40 Hand-Crafted Soundscapes
From a mother's womb heartbeat to a distant pulsar, from bamboo 
rain to underwater currents. Every sound is either a real field 
recording (CC0/CC-BY licensed, credited) or synthesized in-house 
with 24-bit / 48kHz DSP.

• Apple Spatial Audio (New in v1.4)
Put on your AirPods Pro or Max and feel sounds rotate around you 
as you turn your head. Powered by AVAudioEnvironmentNode and 
CMHeadphoneMotionManager.

• Four Audio Quality Tiers
L1 Algorithmic — pure DSP, infinite variation
L2 Field Recording — real-world sources from Freesound archives
L3 Binaural HRTF — 3D positioned via head-related transfer functions
L4 Apple Spatial — head-tracked immersive audio

• 100% Offline, 100% Private
All 40 sounds ship inside the app. No streaming. No tracking. No 
account. Your listening habits never leave your device.

• Designed for Real Life
Baby sleep: womb heartbeat, shushing, lullaby ambience
Deep focus: brown noise, library ambience, coffee shop
Meditation: Tibetan bowls, forest streams, ocean waves
Stargazing: cosmic pulsars, deep space drones


FREE vs PRO

Free includes 8 essential sounds and standard quality.

Pro ($3.99 one-time) unlocks:
• All 40 sounds
• Apple Spatial Audio and Binaural HRTF
• Highest quality tier per sound
• All future sound packs, forever

No subscriptions. No renewals. One purchase, one lifetime.


TECHNICAL HIGHLIGHTS

• Built natively with SwiftUI and AVFoundation
• AAC 256 kbps / 48 kHz mastering
• 78 MB total bundle, fully offline
• iOS 17+ optimized, iPhone and iPad universal
• Battery-friendly low-power mixing engine


CREDITS

Field recordings licensed under Creative Commons from the 
Freesound community. Full attribution at muon.app/credits.


SUPPORT

Questions or feedback? Email support@muon.app
Privacy Policy: https://flashbody.github.io/Muon/privacy
Terms of Service: https://flashbody.github.io/Muon/terms


Sleep better. Focus deeper. Own your sounds.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Muon Pro Monthly | $3.99 | per month |
| Muon Pro Yearly | $19.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Muon Pro Lifetime | $99.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-05-07

No release notes.

## More apps by 福顺 杨

- [SnippetBox](https://appshunter.io/ios/app/snippetbox/id6760775089)
- [Receipts AI - Tax Scanner](https://appshunter.io/ios/app/receipts-ai-tax-scanner/id6765854870)
- [Kickoff:Soccer&Football Scores](https://appshunter.io/ios/app/kickoffsoccer-and-football-scores/id6767148447)

All apps by 福顺 杨: https://appshunter.io/developer/1564840056

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-14.*