# Dual N vs ITパスポート 暗記・勉強アプリ

The clearest difference is update cadence: Dual N at every 5 days against ITパスポート 暗記・勉強アプリ's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Dual N sells 1 one-off in-app purchase and ITパスポート 暗記・勉強アプリ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Dual N ships an update every 5 days, ITパスポート 暗記・勉強アプリ every 9 days. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Dual N | ITパスポート 暗記・勉強アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Every 9 days |
| Size | 13 MB | 49 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takanori Horitsu](https://appshunter.io/developer/1896386009) | [Hajime App Lab](https://appshunter.io/developer/1704838092) |

## What reviewers say

### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-brain-trainer/id6767109556)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free | $0.99 | one-time |


### ITパスポート 暗記・勉強アプリ

[App page](https://appshunter.io/ios/app/it/id6776047396)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $3.99 | one-time |


## Frequently asked questions

### Is Dual N free?

Dual N is free to download, with in-app purchases available.

### Is ITパスポート 暗記・勉強アプリ free?

ITパスポート 暗記・勉強アプリ is free to download, with in-app purchases available.

### Do Dual N or ITパスポート 暗記・勉強アプリ have ads?

Both Dual N and ITパスポート 暗記・勉強アプリ show ads.

### Which is updated more often, Dual N or ITパスポート 暗記・勉強アプリ?

Dual N ships an update every 5 days, and ITパスポート 暗記・勉強アプリ every 9 days. Most recently, Dual N was updated on October 18, 2026 and ITパスポート 暗記・勉強アプリ on October 6, 2026.

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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.*