# 21 Boxing vs AULA CF

The clearest difference is update cadence: AULA CF at every 4 weeks against 21 Boxing's every 19 months. 21 Boxing's advantage is iOS requirement (13.0 vs 15.0). 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.

21 Boxing ships an update every 19 months, AULA CF every 4 weeks. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 21 Boxing | AULA CF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 4 weeks** |
| Size | 11 MB | 90 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [21 Boxing](https://appshunter.io/developer/1495174217) | [Clupik](https://appshunter.io/developer/1282527621) |

## What reviewers say

### 21 Boxing

[App page](https://appshunter.io/ios/app/21-boxing/id1501549233)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### AULA CF

[App page](https://appshunter.io/ios/app/aula-cf/id6460304592)

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

**In-app purchases:** none


## Frequently asked questions

### Is 21 Boxing free?

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

### Is AULA CF free?

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

### Do 21 Boxing or AULA CF have ads?

Neither 21 Boxing nor AULA CF shows ads.

### Which is updated more often, 21 Boxing or AULA CF?

21 Boxing ships an update every 19 months, and AULA CF every 4 weeks. Most recently, 21 Boxing was updated on October 4, 2026 and AULA CF on October 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.*