# Hex vs 21

The clearest difference is ads: Hex at none against 21's shown. Hex also leads on iOS requirement (13.0 vs 15.1). 21's advantage is update cadence (every 2 days vs every 13 months). On price, 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.

Hex ships an update every 13 months, 21 every 2 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Hex | 21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 2 days** |
| Size | 59 MB | 39 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Barile](https://appshunter.io/developer/853552042) | [Chee Hoong Khor](https://appshunter.io/developer/1880679655) |

## What reviewers say

### Hex

[App page](https://appshunter.io/ios/app/hex-o/id6587577466)

**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 Hex free?

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

### Is 21 free?

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

### Do Hex or 21 have ads?

21 shows ads; Hex does not.

### Which is updated more often, Hex or 21?

Hex ships an update every 13 months, and 21 every 2 days. Most recently, Hex was updated on October 27, 2026 and 21 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.*