# C vs Three9x

The clearest difference is update cadence: C at every 10 days against Three9x's every 5 weeks. C also leads on 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.

C ships an update every 10 days, Three9x every 5 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | C | Three9x |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 weeks |
| Size | 56 MB | 496 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Xiamen C-chip Technology Co., Ltd.](https://appshunter.io/developer/1449112327) | [THREE9X (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/6782750724) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-ox/id6754757146)

**Features:** macOS Compatibility

**In-app purchases:** none


### Three9x

[App page](https://appshunter.io/ios/app/three9x/id6782750722)

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

**In-app purchases:** none


## Frequently asked questions

### Is C free?

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

### Is Three9x free?

Three9x is free to download, with no in-app purchases.

### Do C or Three9x have ads?

Neither C nor Three9x shows ads.

### Which is updated more often, C or Three9x?

C ships an update every 10 days, and Three9x every 5 weeks. Most recently, C was updated on October 25, 2026 and Three9x 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.*