# Butteryfly Sort vs CatStack!

The clearest difference is ads: CatStack! at none against Butteryfly Sort's shown. Butteryfly Sort's advantage is iOS requirement (12.0 vs 18.5). 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 | Butteryfly Sort | CatStack! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 16 months | — |
| Size | 456 MB | 42 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mei Hui Lin](https://appshunter.io/developer/1636598564) | [TAKURO INOUE](https://appshunter.io/developer/1806841917) |

## What reviewers say

### Butteryfly Sort

[App page](https://appshunter.io/ios/app/butteryfly-sort/id6739238092)

**Features:** macOS Compatibility

**In-app purchases:** none


### CatStack!

[App page](https://appshunter.io/ios/app/catstack/id6747741193)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Butteryfly Sort free?

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

### Is CatStack! free?

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

### Do Butteryfly Sort or CatStack! have ads?

Butteryfly Sort shows ads; CatStack! 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.*