# 危険物乙4 問題集 vs 危険物乙4 一問一答・模試 オツスキ！

The clearest difference is ads: 危険物乙4 問題集 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 問題集 also leads on update cadence (every 8 days 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 問題集 sells 1 one-off in-app purchase and 危険物乙4 一問一答・模試 オツスキ！ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

危険物乙4 問題集 ships an update every 8 days, 危険物乙4 一問一答・模試 オツスキ！ monthly. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 危険物乙4 問題集 | 危険物乙4 一問一答・模試 オツスキ！ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Monthly |
| Size | 14 MB | 30 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RIVERSHIP](https://appshunter.io/developer/6780804499) | [NAGAKAWA MASAHIKO](https://appshunter.io/developer/1872718412) |

## What reviewers say

### 危険物乙4 問題集

[App page](https://appshunter.io/ios/app/4/id6785840919)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全問題アンロック | $4.99 | one-time |


### 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 |


## Frequently asked questions

### Is 危険物乙4 問題集 free?

危険物乙4 問題集 is free to download, with in-app purchases available.

### 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.

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

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

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

危険物乙4 問題集 ships an update every 8 days, and 危険物乙4 一問一答・模試 オツスキ！ monthly. Most recently, 危険物乙4 問題集 was updated on November 5, 2026 and 危険物乙4 一問一答・模試 オツスキ！ on November 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.*