# 郑常飞 vs CDAIS

The clearest difference is update cadence: CDAIS at every 5 weeks against 郑常飞's every 12 months. 郑常飞's advantage is iOS requirement (8.0 vs 10.0). 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.

郑常飞 ships an update every 12 months, CDAIS every 5 weeks. The most recent releases landed on October 26, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 郑常飞 | CDAIS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 5 weeks** |
| Size | 68 MB | 20 MB |
| Requires iOS | **8.0** | 10.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [广东机场白云信息科技有限公司](https://appshunter.io/developer/1153268667) | [Continental Holding China Co., Ltd.](https://appshunter.io/developer/1625852531) |

## What reviewers say

### 郑常飞

[App page](https://appshunter.io/ios/app/id1420994997)

**In-app purchases:** none


### CDAIS

[App page](https://appshunter.io/ios/app/cdais/id1625852529)

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

**In-app purchases:** none


## Frequently asked questions

### Is 郑常飞 free?

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

### Is CDAIS free?

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

### Do 郑常飞 or CDAIS have ads?

Neither 郑常飞 nor CDAIS shows ads.

### Which is updated more often, 郑常飞 or CDAIS?

郑常飞 ships an update every 12 months, and CDAIS every 5 weeks. Most recently, 郑常飞 was updated on October 26, 2026 and CDAIS 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.*