# Calculus Gacha！ vs QR課題チェック改

The clearest difference is in-app purchases: QR課題チェック改 at none against Calculus Gacha！'s 4. Calculus Gacha！'s advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.1). On price and ads there is nothing between them.

Both are free to download. Calculus Gacha！ sells 4 one-off in-app purchases. QR課題チェック改 asks for nothing beyond the download.

## The numbers

| Metric | Calculus Gacha！ | QR課題チェック改 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 83 MB | 14 MB |
| Requires iOS | **15.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shunsuke Nakamura](https://appshunter.io/developer/1828229182) | [taihei yamazaki](https://appshunter.io/developer/1789299090) |

## What reviewers say

### Calculus Gacha！

[App page](https://appshunter.io/ios/app/calculus-gacha/id6753078774)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 不定方程式ガチャ利用オプション | $0.99 | one-time |
| AI Tutor Pass | $2.99 | one-time |
| AI Tutor Plus(500) | $2.99 | one-time |
| 履歴管理機能オプション | $2.99 | one-time |


### QR課題チェック改

[App page](https://appshunter.io/ios/app/qr/id6768233962)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculus Gacha！ free?

Calculus Gacha！ is free to download, with in-app purchases available.

### Is QR課題チェック改 free?

QR課題チェック改 is free to download, with no in-app purchases.

### Do Calculus Gacha！ or QR課題チェック改 have ads?

Neither Calculus Gacha！ nor QR課題チェック改 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.*