# C vs How睡眠

The clearest difference is in-app purchases: C at none against How睡眠's 5. C also leads on iOS requirement (12.0 vs 14.0). How睡眠's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. How睡眠 sells 5 one-off in-app purchases. C asks for nothing beyond the download.

C ships an update every 6 weeks, How睡眠 every 2 weeks. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | C | How睡眠 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 35 MB | 138 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [深圳数联天下智能科技有限公司](https://appshunter.io/developer/1694637742) | [重庆鲤想派科技有限公司](https://appshunter.io/developer/1810646324) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-life/id1097012066)

**Features:** macOS Compatibility

**In-app purchases:** none


### How睡眠

[App page](https://appshunter.io/ios/app/how/id6746926603)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $9.99 | one-time |
| 季度会员 | $24.99 | one-time |
| 优惠永久会员 | $29.99 | one-time |
| 年度会员 | $99.99 | one-time |
| 永久会员 | $299.99 | one-time |


## Frequently asked questions

### Is C free?

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

### Is How睡眠 free?

How睡眠 is free to download, with in-app purchases available.

### Do C or How睡眠 have ads?

Neither C nor How睡眠 shows ads.

### Which is updated more often, C or How睡眠?

C ships an update every 6 weeks, and How睡眠 every 2 weeks. Most recently, C was updated on September 10, 2026 and How睡眠 on September 17, 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.*