# CatBlock vs Blazz!

The clearest difference is ads: CatBlock at none against Blazz!'s shown. Blazz!'s advantage is update cadence (weekly vs every 3 weeks). 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.

CatBlock ships an update every 3 weeks, Blazz! weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | CatBlock | Blazz! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 105 MB | 53 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kouryou cho](https://appshunter.io/developer/1893279296) | [Vladyslav Prymak](https://appshunter.io/developer/1629209522) |

## What reviewers say

### CatBlock

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

**In-app purchases:** none


### Blazz!

[App page](https://appshunter.io/ios/app/blazz/id6762187872)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CatBlock free?

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

### Is Blazz! free?

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

### Do CatBlock or Blazz! have ads?

Blazz! shows ads; CatBlock does not.

### Which is updated more often, CatBlock or Blazz!?

CatBlock ships an update every 3 weeks, and Blazz! weekly. Most recently, CatBlock was updated on October 25, 2026 and Blazz! 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.*