# Fractal Catalog vs どーれかな？（数の理解版）

The clearest difference is price: どーれかな？（数の理解版） at Free against Fractal Catalog's $2.99. Fractal Catalog's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On ads and in-app purchases there is nothing between them.

どーれかな？（数の理解版） is free to download; Fractal Catalog costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Fractal Catalog | どーれかな？（数の理解版） |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Size | 4 MB | 27 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Kouichi INAFUKU](https://appshunter.io/developer/438372899) |

## What reviewers say

### Fractal Catalog

[App page](https://appshunter.io/ios/app/fractal-catalog/id1529064801)

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

**In-app purchases:** none


### どーれかな？（数の理解版）

[App page](https://appshunter.io/ios/app/id6467016985)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fractal Catalog free?

Fractal Catalog costs $2.99, with no in-app purchases.

### Is どーれかな？（数の理解版） free?

どーれかな？（数の理解版） is free to download, with no in-app purchases.

### Do Fractal Catalog or どーれかな？（数の理解版） have ads?

Neither Fractal Catalog nor どーれかな？（数の理解版） shows ads.

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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.*