# 補数チャレンジ！ vs ガチ2桁九九

The clearest difference is in-app purchases: 補数チャレンジ！ at none against ガチ2桁九九's 1. ガチ2桁九九's advantage is device support and iOS requirement (15.0 vs 17.2). On price there is nothing between them.

Both are free to download. ガチ2桁九九 sells 1 one-off in-app purchase. 補数チャレンジ！ asks for nothing beyond the download.

## The numbers

| Metric | 補数チャレンジ！ | ガチ2桁九九 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 2 MB | 24 MB |
| Requires iOS | 17.2 | **15.0** |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kazuhiko Maruyama](https://appshunter.io/developer/1731223811) | [kotobaz](https://appshunter.io/developer/1634727152) |

## What reviewers say

### 補数チャレンジ！

[App page](https://appshunter.io/ios/app/id6478446057)

**In-app purchases:** none


### ガチ2桁九九

[App page](https://appshunter.io/ios/app/2/id6777702804)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム解放 | $2.99 | one-time |


## Frequently asked questions

### Is 補数チャレンジ！ free?

補数チャレンジ！ is free to download, with no in-app purchases.

### Is ガチ2桁九九 free?

ガチ2桁九九 is free to download, with in-app purchases available.

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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.*