# C vs 睡眠精灵

The clearest difference is in-app purchases: C at none against 睡眠精灵's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 睡眠精灵 sells 3 in-app purchases, starting at $3.49 per month. C asks for nothing beyond the download.

C ships an update every 6 weeks, 睡眠精灵 every 5 weeks. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | C | 睡眠精灵 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Size | 35 MB | 66 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳数联天下智能科技有限公司](https://appshunter.io/developer/1694637742) | [长沙年余信息科技有限公司](https://appshunter.io/developer/1469330214) |

## What reviewers say

### C

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 睡眠精灵

[App page](https://appshunter.io/ios/app/id1473217152)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP包月 | $3.49 | per month |
| VIP包季 | $7.99 | per 3 months |
| VIP包年 | $28.99 | per year |


## Frequently asked questions

### Is C free?

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

### Is 睡眠精灵 free?

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

### Do C or 睡眠精灵 have ads?

Neither C nor 睡眠精灵 shows ads.

### Which is updated more often, C or 睡眠精灵?

C ships an update every 6 weeks, and 睡眠精灵 every 5 weeks. Most recently, C was updated on October 29, 2026 and 睡眠精灵 on October 26, 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.*