# 白噪音 vs 绵眠

The clearest difference is in-app purchases: 绵眠 at none against 白噪音's 1. 白噪音's advantage is update cadence (every 3 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 白噪音 sells 1 one-off in-app purchase. 绵眠 asks for nothing beyond the download.

白噪音 ships an update every 3 days, 绵眠 every 3 months. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 白噪音 | 绵眠 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Size | 17 MB | 133 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [颖昭 范](https://appshunter.io/developer/1476704080) | [Shanghai Qianfenzhiyi Information Technology Co., Ltd.](https://appshunter.io/developer/1701362512) |

## What reviewers say

### 白噪音

[App page](https://appshunter.io/ios/app/id1660738083)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 购买VIP | $1.99 | one-time |


### 绵眠

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 白噪音 free?

白噪音 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 白噪音 or 绵眠 have ads?

Neither 白噪音 nor 绵眠 shows ads.

### Which is updated more often, 白噪音 or 绵眠?

白噪音 ships an update every 3 days, and 绵眠 every 3 months. Most recently, 白噪音 was updated on September 14, 2026 and 绵眠 on September 9, 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.*