# TCK 4.0 vs One Union

The clearest difference is update cadence: One Union at every 4 days against TCK 4.0's monthly. TCK 4.0's advantage is iOS requirement (12.0 vs 15.6). 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.

TCK 4.0 ships an update monthly, One Union every 4 days. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TCK 4.0 | One Union |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 106 MB | 49 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Thuy Linh Bui](https://appshunter.io/developer/1650176718) | [Thai Cong Tran](https://appshunter.io/developer/1734079715) |

## What reviewers say

### TCK 4.0

[App page](https://appshunter.io/ios/app/tck-40/id1628848819)

**Features:** Vision Pro support

**In-app purchases:** none


### One Union

[App page](https://appshunter.io/ios/app/one-union/id6738283505)

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

**In-app purchases:** none


## Frequently asked questions

### Is TCK 4.0 free?

TCK 4.0 is free to download, with no in-app purchases.

### Is One Union free?

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

### Do TCK 4.0 or One Union have ads?

Neither TCK 4.0 nor One Union shows ads.

### Which is updated more often, TCK 4.0 or One Union?

TCK 4.0 ships an update monthly, and One Union every 4 days. Most recently, TCK 4.0 was updated on October 6, 2026 and One Union on October 25, 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.*