# 司空 vs 星密

The clearest difference is in-app purchases: 星密 at none against 司空's 4. 星密 also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 司空 sells 4 one-off in-app purchases. 星密 asks for nothing beyond the download.

司空 ships an update every 3 weeks, 星密 every 4 weeks. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 司空 | 星密 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Size | 71 MB | 43 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhejiang Qmake Information Technology Co.,Ltd](https://appshunter.io/developer/1450462647) | [逸 刘](https://appshunter.io/developer/1483297788) |

## What reviewers say

### 司空

[App page](https://appshunter.io/ios/app/id1450464065)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 司空1个月会员 | $0.99 | one-time |
| 司空3个月会员 | $3.99 | one-time |
| 司空季度会员 | $9.99 | one-time |
| 司空12个月会员 | $14.99 | one-time |


### 星密

[App page](https://appshunter.io/ios/app/id6447797300)

**In-app purchases:** none


## Frequently asked questions

### Is 司空 free?

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

### Is 星密 free?

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

### Do 司空 or 星密 have ads?

Neither 司空 nor 星密 shows ads.

### Which is updated more often, 司空 or 星密?

司空 ships an update every 3 weeks, and 星密 every 4 weeks. Most recently, 司空 was updated on October 18, 2026 and 星密 on October 12, 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.*