# KaiShui: Brown Noise & Tracker — Sleep Sounds, Mixer & Insights

> Sleep Sounds, Mixer & Insights (iPhone/iPad app by 凌峰 高.)

- Source: https://appshunter.io/ios/app/kaishui-brown-noise-and-tracker/id6761164087 (this page in markdown: same URL + `.md`)
- Developer: [凌峰 高](https://appshunter.io/developer/1887860748)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 237 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-05-15
- Data updated: 2026-09-03
- User reviews in markdown: https://appshunter.io/ios/app/kaishui-brown-noise-and-tracker/id6761164087/reviews.md

## What is KaiShui?

Say goodbye to repetitive, generic loops. "KaiShui" is a premium tool designed for audio customization and deep sleep analysis. Deeply integrated with iOS features, we give you ultimate control over your sleep environment.

【Key Features】

10-Track Smart Mixing Engine: Unique dual-layer logic for background ambiance and accent sounds. Supports independent volume control, random intervals, delayed starts, and fade-in/out to simulate a truly natural, non-repeating soundscape.

Live Activities & Dynamic Island: Track your sleep countdown directly on the lock screen and Dynamic Island without unlocking your phone.

HealthKit Insights: Sync with Apple Watch to monitor sleep stages (Deep, REM, etc.) and heart rate. Our algorithm analyzes which sound combination induces your deep sleep best.

Siri & Automation: Supports "Hey Siri, start sleep session" to seamlessly blend into your smart iOS life.
All-Format Audio Import: Supports MP3, M4A, FLAC, and more. Import your favorite tracks into the mixing engine for infinite possibilities.

【Our Promise】
Focused entirely on sleep. No ads, no social features, no bloated recommendations. Supports iCloud backup for cross-device syncing.
Privacy Policy：https://www.yuque.com/bashert/hzq6z2/gi672n1ydh2h02dt?singleDoc# 
Terms of Use/EULA：https://www.yuque.com/bashert/hzq6z2/ezvibonrmu1mebbf?singleDoc#

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual | $14.99 | per year |
| KaiShui VIP Monthly | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Kaishui VIP - Lifetime Early Bird | $14.99 | one-time |
| KaiShui VIP Lifetime | $29.99 | one-time |
| KaiShui VIP Lifetime (35% OFF) | $19.99 | one-time |



## Version history (last 5 releases)

### 2.7.0 — 2026-08-29

What’s new in KaiShui 2.7.0:
- Introducing Bedside Speaker: start a curated sleep soundscape with one tap, accompanied by gentle breathing light effects and a sleep timer.
- Discover new long-form sleep content and responsive sleep companions, including meditations, bedtime stories, and low-stimulation shows.
- A redesigned mixer makes it easier to balance individual tracks, preview your mix, and save it to a playlist.
- Sleep records now lead with last night’s summary and one clear focus for tonight, followed by trends and detailed data.
- My Content now features a more compact overview, category search, and clearer controls for favorites, playback, and management.
- Home shortcuts can be collapsed while keeping direct icon access, and playback controls now stay fixed instead of scrolling away.
- Enjoy a shorter first-run experience, three new Home Screen widget styles, improved iCloud sync, reduced-motion support, and more reliable playback.

### 2.6.0 — 2026-07-17

Welcome to KaiShui 2.6.0:

- Discover long-form sleep content, including meditations, bedtime stories, and low-stimulation shows. Subscribe or save for later, then add an episode to a playlist and start sleep from Home.
- Meet responsive sleep companions, with richer sleep records, weekly reports, and trend insights.
- Enjoy a redesigned audio and sound library. Cloud items can be added straight to playlists, with much clearer download and offline states.
- Choose from three distinctive new Home Screen widget styles, plus improved iCloud sync and playback stability.

### 2.5.0 — 2026-07-02

Improved lock screen and background playback stability to reduce unexpected audio interruptions.
Optimized membership recognition and purchase restoration for more reliable entitlement syncing.
Added a copyable User ID to help support resolve membership issues faster.
Merged sleep reports, weekly reports, and sleep coaching into Sleep Records for easier access.
Updated lifetime early-bird pricing support and fixed several known issues.

### 2.4.0 — 2026-07-01

Fixed an issue where sleep audio could unexpectedly stop during lock-screen playback and improved background playback stability. Improved VIP status syncing after purchase, restore, and code redemption. Sleep Records now brings sleep reports, weekly reports, and Sleep Coach together in one place, reducing duplicate entries in Settings.

### 2.3.0 — 2026-06-23

Fixed an occasional playback pause issue.

Optimized user experience flows.

Added more detailed sleep data and related analytics.

## Apps similar to KaiShui

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [PooClock](https://appshunter.io/ios/app/pooclock/id6763887046) | 5.0 (1) | Free | Health & Fitness |

## More apps by 凌峰 高

- [FitCurve: GLP-1 Tracker](https://appshunter.io/ios/app/fitcurve-glp-1-tracker/id6762743807)
- [Photo Cleaner:AI Smart Cleanup](https://appshunter.io/ios/app/photo-cleanerai-smart-cleanup/id6768494765)

All apps by 凌峰 高: https://appshunter.io/developer/1887860748

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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 2026-09-03.*