# 間違い問題メモ vs DORILOOP

The clearest difference is in-app purchases: 間違い問題メモ at none against DORILOOP's 1. DORILOOP's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. DORILOOP sells 1 one-off in-app purchase. 間違い問題メモ asks for nothing beyond the download.

## The numbers

| Metric | 間違い問題メモ | DORILOOP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | — | Every 2 weeks |
| Size | 5 MB | 78 MB |
| Requires iOS | 15.5 | **15.1** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Risako Asai](https://appshunter.io/developer/1671273580) | [naoki waratani](https://appshunter.io/developer/1870038956) |

## What reviewers say

### 間違い問題メモ

[App page](https://appshunter.io/ios/app/id1626302272)

**In-app purchases:** none


### DORILOOP

[App page](https://appshunter.io/ios/app/doriloop/id6757974564)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $3.99 | one-time |


## Frequently asked questions

### Is 間違い問題メモ free?

間違い問題メモ is free to download, with no in-app purchases.

### Is DORILOOP free?

DORILOOP 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.*