# Crystal vs 承知

The clearest difference is iOS requirement: Crystal at 9.0 against 承知's 15.1. 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, 承知 monthly. The most recent releases landed on October 28, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Crystal | 承知 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 41 MB | 88 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai EverTrend Enterprise Co., Ltd.](https://appshunter.io/developer/1348509026) | [Chengzhi Data (Chengdu) Co., Ltd](https://appshunter.io/developer/1887198198) |

## What reviewers say

### Crystal

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 承知

[App page](https://appshunter.io/ios/app/id6760997364)

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

**In-app purchases:** none


## Frequently asked questions

### Is Crystal free?

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

### Is 承知 free?

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

### Do Crystal or 承知 have ads?

Neither Crystal nor 承知 shows ads.

### Which is updated more often, Crystal or 承知?

Crystal ships an update every 3 weeks, and 承知 monthly. Most recently, Crystal was updated on October 28, 2026 and 承知 on October 8, 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.*