# Dual N Back vs 天文宇宙検定1級 過去問・暗記アプリ

The clearest difference is in-app purchases: Dual N Back at none against 天文宇宙検定1級 過去問・暗記アプリ's 3. Dual N Back also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 天文宇宙検定1級 過去問・暗記アプリ sells 3 one-off in-app purchases. Dual N Back asks for nothing beyond the download.

## The numbers

| Metric | Dual N Back | 天文宇宙検定1級 過去問・暗記アプリ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Size | 1 MB | 42 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yuta Hirose](https://appshunter.io/developer/1896426121) | [Hajime App Lab](https://appshunter.io/developer/1704838092) |

## What reviewers say

### Dual N Back

[App page](https://appshunter.io/ios/app/dual-n-back/id6767213239)

**In-app purchases:** none


### 天文宇宙検定1級 過去問・暗記アプリ

[App page](https://appshunter.io/ios/app/1/id6784950185)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告削除 | $3.99 | one-time |
| 全問題解放 | $3.99 | one-time |
| 広告削除+全問題解放 | $5.99 | one-time |


## Frequently asked questions

### Is Dual N Back free?

Dual N Back is free to download, with no in-app purchases.

### Is 天文宇宙検定1級 過去問・暗記アプリ free?

天文宇宙検定1級 過去問・暗記アプリ is free to download, with in-app purchases available.

### Do Dual N Back or 天文宇宙検定1級 過去問・暗記アプリ have ads?

天文宇宙検定1級 過去問・暗記アプリ shows ads; Dual N Back does not.

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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.*