# SleepMaster:White Noise&Sounds — Sounds for Sleep & Relaxation

> Sounds for Sleep & Relaxation (iPhone/iPad app by 明杰 张.)

- Source: https://appshunter.io/ios/app/sleepmasterwhite-noise-and-sounds/id6818762928 (this page in markdown: same URL + `.md`)
- Developer: [明杰 张](https://appshunter.io/developer/6778631215)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 57 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-10-10
- Data updated: 2026-11-01

## What is SleepMaster?

SleepMaster is a completely offline white noise app designed to help you and your baby relax and fall asleep quickly. It features carefully selected natural sounds, Alpha waves, and baby soothing audio to block out environmental noise.

【Key Features】
· Baby Soothing & Sleep: NEW! Dedicated white noise (womb, shush, etc.) and scene mixes for infants. Supports multi-track mixing to gently lull your baby to sleep.
· Immersive White Noise: Supports multi-track free mixing. Mix and match rain, thunder, water, campfire, and Alpha waves.
· Sleep Timer: Set a countdown, and the volume will automatically fade out so it won't disturb your sleep.
· My Library: Save your favorite sound mixes with one tap and quickly replay them next time.
· Scientific Breathing Exercises: Includes 4-7-8, Box, Belly, and 4-2-6 guided modes with voice prompts to help you quickly calm your emotions.
· Personalization: 24 gradient backgrounds, lock screen controls, and background audio playback.

【Privacy & No Ads Promise】
· Zero Network Requests: All audio resources are bundled locally, fully offline.
· Zero Data Collection: No personal data collected, no ads, no tracking, no third-party SDKs.
· Your sleep time belongs only to you.

【Premium】
· One-time purchase (Non-consumable): Unlock all premium sounds, the Baby section, backgrounds, and future features.
· No subscriptions, no hidden fees.

【Terms & Policies】
· Privacy Policy: https://mjxlzhang.github.io/sleepmaster/privacy.html
· Terms of Use: https://mjxlzhang.github.io/sleepmaster/terms.html

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium Lifetime | $2.99 | one-time |


## Is SleepMaster safe?

Not enough ratings yet to assess SleepMaster.

## Is SleepMaster legit?

SleepMaster:White Noise&Sounds appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SleepMaster is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.6.1 — 2026-10-29

This update introduces full multi-language support, including a brand-new English interface and localized content, providing a more seamless and tailored sleep experience for users worldwide.

### 1.5.0 — 2026-10-23

尊敬的苹果审核团队：本次更新为日常版本升级，新增了宝宝安抚与哄睡白噪音板块。相关音频均符合版权规定，完全在本地运行，不收集任何用户数据，不含违规内容。感谢您的审核！

### 1.4.0 — 2026-10-21

- 呼吸练习重磅升级！新增4款语音口令与跟练版，温柔人声实时引导。跟随节奏深呼吸，平复情绪，安心好眠。

### 1.3.2 — 2026-10-18

-Bug修复 & 性能提升

### 1.2.2 — 2026-10-10

No release notes.

## More apps by 明杰 张

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All apps by 明杰 张: https://appshunter.io/developer/6778631215

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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 2026-11-01.*