# 危険物乙4 一問一答・模試 オツスキ！ vs 危険物乙4 合格予測 問題集・模試

The clearest difference is ads: 危険物乙4 合格予測 問題集・模試 at none against 危険物乙4 一問一答・模試 オツスキ！'s shown. 危険物乙4 合格予測 問題集・模試 also leads on update cadence (fortnightly vs monthly). 危険物乙4 一問一答・模試 オツスキ！'s advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 危険物乙4 一問一答・模試 オツスキ！ sells 1 one-off in-app purchase and 危険物乙4 合格予測 問題集・模試 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

危険物乙4 一問一答・模試 オツスキ！ ships an update monthly, 危険物乙4 合格予測 問題集・模試 fortnightly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 危険物乙4 一問一答・模試 オツスキ！ | 危険物乙4 合格予測 問題集・模試 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Fortnightly** |
| Size | 30 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NAGAKAWA MASAHIKO](https://appshunter.io/developer/1872718412) | [Takaho Hayashi](https://appshunter.io/developer/6788691940) |

## What reviewers say

### 危険物乙4 一問一答・模試 オツスキ！

[App page](https://appshunter.io/ios/app/4/id6801225154)

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

**In-app purchases (1)**

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


### 危険物乙4 合格予測 問題集・模試

[App page](https://appshunter.io/ios/app/4/id6819255265)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全機能解除 | $4.99 | one-time |


## Frequently asked questions

### Is 危険物乙4 一問一答・模試 オツスキ！ free?

危険物乙4 一問一答・模試 オツスキ！ is free to download, with in-app purchases available.

### Is 危険物乙4 合格予測 問題集・模試 free?

危険物乙4 合格予測 問題集・模試 is free to download, with in-app purchases available.

### Do 危険物乙4 一問一答・模試 オツスキ！ or 危険物乙4 合格予測 問題集・模試 have ads?

危険物乙4 一問一答・模試 オツスキ！ shows ads; 危険物乙4 合格予測 問題集・模試 does not.

### Which is updated more often, 危険物乙4 一問一答・模試 オツスキ！ or 危険物乙4 合格予測 問題集・模試?

危険物乙4 一問一答・模試 オツスキ！ ships an update monthly, and 危険物乙4 合格予測 問題集・模試 fortnightly. Most recently, 危険物乙4 一問一答・模試 オツスキ！ was updated on November 6, 2026 and 危険物乙4 合格予測 問題集・模試 on October 31, 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.*