# Fox Classic PRO vs 21

The clearest difference is ads: Fox Classic PRO at none against 21's shown. 21's advantage is update cadence (every 2 days vs every 12 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fox Classic PRO ships an update every 12 months, 21 every 2 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Fox Classic PRO | 21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 days** |
| Size | 5 MB | 39 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Igor Patrikeev](https://appshunter.io/developer/1717119256) | [Chee Hoong Khor](https://appshunter.io/developer/1880679655) |

## What reviewers say

### Fox Classic PRO

[App page](https://appshunter.io/ios/app/fox-classic-pro/id6739705294)

**Features:** macOS Compatibility

**In-app purchases:** none


### 21

[App page](https://appshunter.io/ios/app/21-twenty-one/id6759793279)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fox Classic PRO free?

Fox Classic PRO is free to download, with no in-app purchases.

### Is 21 free?

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

### Do Fox Classic PRO or 21 have ads?

21 shows ads; Fox Classic PRO does not.

### Which is updated more often, Fox Classic PRO or 21?

Fox Classic PRO ships an update every 12 months, and 21 every 2 days. Most recently, Fox Classic PRO was updated on October 30, 2026 and 21 on November 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.*