# AI先生　危険物乙４類 vs 令和7年度　火薬類取扱保安責任者

The clearest difference is price: AI先生　危険物乙４類 at Free against 令和7年度　火薬類取扱保安責任者's $5.99. 令和7年度　火薬類取扱保安責任者's advantage is device support and iOS requirement (16.6 vs 18.1). On in-app purchases there is nothing between them.

AI先生　危険物乙４類 is free to download; 令和7年度　火薬類取扱保安責任者 costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | AI先生　危険物乙４類 | 令和7年度　火薬類取扱保安責任者 |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 3 days |
| Monetization | — | Paid |
| Size | 4 MB | 19 MB |
| Requires iOS | 18.1 | **16.6** |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [reiko hori](https://appshunter.io/developer/1777370692) | [Yasunori Mizuta](https://appshunter.io/developer/1795142934) |

## What reviewers say

### AI先生　危険物乙４類

[App page](https://appshunter.io/ios/app/ai/id6738078612)

**In-app purchases:** none


### 令和7年度　火薬類取扱保安責任者

[App page](https://appshunter.io/ios/app/7/id6748983548)

Access past exam questions for the Explosives Safety Officer exam from 2020 to 2024. Study anytime, anywhere to prepare for the upcoming 2025 exam.

**Highlights:** Past exam questions (2020-2024), Study on the go, Prepare for 2025 exam, Convenient learning

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

**In-app purchases:** none


## Frequently asked questions

### Is AI先生　危険物乙４類 free?

AI先生　危険物乙４類 is free to download, with no in-app purchases.

### Is 令和7年度　火薬類取扱保安責任者 free?

令和7年度　火薬類取扱保安責任者 costs $5.99, with no in-app purchases.

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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.*