# Combo Collapse vs 21

The clearest difference is update cadence: 21 at every 2 days against Combo Collapse's weekly. 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.

Combo Collapse ships an update weekly, 21 every 2 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Combo Collapse | 21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 2 days** |
| Size | 8 MB | 39 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jesse Lewis](https://appshunter.io/developer/1868776563) | [Chee Hoong Khor](https://appshunter.io/developer/1880679655) |

## What reviewers say

### Combo Collapse

[App page](https://appshunter.io/ios/app/combo-collapse-logic-puzzle/id6758558153)

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

**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 Combo Collapse free?

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

### Is 21 free?

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

### Do Combo Collapse or 21 have ads?

Both Combo Collapse and 21 show ads.

### Which is updated more often, Combo Collapse or 21?

Combo Collapse ships an update weekly, and 21 every 2 days. Most recently, Combo Collapse was updated on October 28, 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.*