# 奇房 vs 恒等式

The clearest difference is update cadence: 恒等式 at fortnightly against 奇房's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

奇房 ships an update every 2 months, 恒等式 fortnightly. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 奇房 | 恒等式 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 40 MB | 90 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [厦门银狐软件科技有限公司](https://appshunter.io/developer/1106335195) | [Keshun Waterproof Technologies Co.,Ltd](https://appshunter.io/developer/1615344877) |

## What reviewers say

### 奇房

[App page](https://appshunter.io/ios/app/id1106335196)

**Features:** macOS Compatibility

**In-app purchases:** none


### 恒等式

[App page](https://appshunter.io/ios/app/id6447490134)

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

**In-app purchases:** none


## Frequently asked questions

### Is 奇房 free?

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

### Is 恒等式 free?

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

### Do 奇房 or 恒等式 have ads?

Neither 奇房 nor 恒等式 shows ads.

### Which is updated more often, 奇房 or 恒等式?

奇房 ships an update every 2 months, and 恒等式 fortnightly. Most recently, 奇房 was updated on October 8, 2026 and 恒等式 on October 24, 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.*