# Crystal vs 趣质检

The clearest difference is iOS requirement: Crystal at 9.0 against 趣质检's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Crystal ships an update every 3 weeks, 趣质检 every 5 weeks. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Crystal | 趣质检 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 41 MB | 40 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [上海永力信息科技有限公司](https://appshunter.io/developer/1348509026) | [广州研趣信息科技有限公司](https://appshunter.io/developer/1121496665) |

## What reviewers say

### Crystal

[App page](https://appshunter.io/ios/app/crystal/id6448982908)

**Features:** macOS Compatibility

**In-app purchases:** none


### 趣质检

[App page](https://appshunter.io/ios/app/id6472036125)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Crystal free?

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

### Is 趣质检 free?

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

### Do Crystal or 趣质检 have ads?

Neither Crystal nor 趣质检 shows ads.

### Which is updated more often, Crystal or 趣质检?

Crystal ships an update every 3 weeks, and 趣质检 every 5 weeks. Most recently, Crystal was updated on October 5, 2026 and 趣质检 on October 4, 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.*