# White noise for sleep vs 绵眠

The clearest difference is in-app purchases: 绵眠 at none against White noise for sleep's 1. 绵眠 also leads on update cadence (every 3 months vs every 15 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. White noise for sleep sells 1 in-app purchase, starting at $1.99 per 7 days. 绵眠 asks for nothing beyond the download.

White noise for sleep ships an update every 15 months, 绵眠 every 3 months. The most recent releases landed on October 30, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | White noise for sleep | 绵眠 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 months** |
| Size | 46 MB | 133 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [秋平 李](https://appshunter.io/developer/1636667539) | [Shanghai Qianfenzhiyi Information Technology Co., Ltd.](https://appshunter.io/developer/1701362512) |

## What reviewers say

### White noise for sleep

[App page](https://appshunter.io/ios/app/white-noise-for-sleep/id1669647320)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 睡眠管理-连续包周订阅 | $1.99 | per 7 days |


### 绵眠

[App page](https://appshunter.io/ios/app/id6470334085)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is White noise for sleep free?

White noise for sleep is free to download, with in-app purchases available.

### Is 绵眠 free?

绵眠 is free to download, with no in-app purchases.

### Do White noise for sleep or 绵眠 have ads?

Neither White noise for sleep nor 绵眠 shows ads.

### Which is updated more often, White noise for sleep or 绵眠?

White noise for sleep ships an update every 15 months, and 绵眠 every 3 months. Most recently, White noise for sleep was updated on October 30, 2026 and 绵眠 on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*