# Prism Blocks vs CatBlock

The clearest difference is ads: CatBlock at none against Prism Blocks's shown. Prism Blocks's advantage is iOS requirement (13.0 vs 15.0). 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.

## The numbers

| Metric | Prism Blocks | CatBlock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | — | Every 3 weeks |
| Size | 63 MB | 105 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Digital Asset S.r.l.](https://appshunter.io/developer/1502450461) | [kouryou cho](https://appshunter.io/developer/1893279296) |

## What reviewers say

### Prism Blocks

[App page](https://appshunter.io/ios/app/prism-blocks/id6759961366)

**In-app purchases:** none


### CatBlock

[App page](https://appshunter.io/ios/app/catblock/id6762186550)

**In-app purchases:** none


## Frequently asked questions

### Is Prism Blocks free?

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

### Is CatBlock free?

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

### Do Prism Blocks or CatBlock have ads?

Prism Blocks shows ads; CatBlock does not.

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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.*