# TCZN vs CDDK

The clearest difference is iOS requirement: TCZN at 12.0 against CDDK's 15.6. 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.

TCZN ships an update every 4 months, CDDK every 3 months. The most recent releases landed on February 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | TCZN | CDDK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 54 MB | 45 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Zhongxinyou M2M Technology Co., Ltd.](https://appshunter.io/developer/1489982535) | [深圳市创艺慧云信息有限公司](https://appshunter.io/developer/1069607179) |

## What reviewers say

### TCZN

[App page](https://appshunter.io/ios/app/tczn/id1475116742)

**Features:** macOS Compatibility

**In-app purchases:** none


### CDDK

[App page](https://appshunter.io/ios/app/cddk/id1640293218)

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

**In-app purchases:** none


## Frequently asked questions

### Is TCZN free?

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

### Is CDDK free?

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

### Do TCZN or CDDK have ads?

Neither TCZN nor CDDK shows ads.

### Which is updated more often, TCZN or CDDK?

TCZN ships an update every 4 months, and CDDK every 3 months. Most recently, TCZN was updated on February 21, 2026 and CDDK on September 9, 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.*