# 两性健康知识 vs checkin

The clearest difference is device support: checkin at 2 against 两性健康知识's —. 两性健康知识's advantage is iOS requirement (12.0 vs 15.1). On in-app purchases there is nothing between them.

## The numbers

| Metric | 两性健康知识 | checkin |
| --- | --- | --- |
| Price | **Free** | — |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 3 months |
| Size | 15 MB | 31 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | — | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Site Tech LLC](https://appshunter.io/developer/1712090344) | [Thanh Bui Thi Truc](https://appshunter.io/developer/6773255707) |

## What reviewers say

### 两性健康知识

[App page](https://appshunter.io/ios/app/id6469507106)

**In-app purchases:** none


### checkin

[App page](https://appshunter.io/ios/app/checkin-app/id6773255705)

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

**In-app purchases:** none


## Frequently asked questions

### Is 两性健康知识 free?

两性健康知识 is free to download, with no in-app purchases.

### Is checkin free?

Pricing for checkin is not currently listed on the App Store.

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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.*