# 危険物取扱者乙種第四類 vs 第1種作業環境

The clearest difference is in-app purchases: 危険物取扱者乙種第四類 at none against 第1種作業環境's 1. 危険物取扱者乙種第四類 also leads on device support and iOS requirement (12.0 vs 16.0). On price there is nothing between them.

Both are free to download. 第1種作業環境 sells 1 one-off in-app purchase. 危険物取扱者乙種第四類 asks for nothing beyond the download.

## The numbers

| Metric | 危険物取扱者乙種第四類 | 第1種作業環境 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | — |
| Update frequency | Every 2 months | — |
| Size | 13 MB | 5 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Maiji Saito](https://appshunter.io/developer/671719488) | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) |

## What reviewers say

### 危険物取扱者乙種第四類

[App page](https://appshunter.io/ios/app/id671719485)

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

**In-app purchases:** none


### 第1種作業環境

[App page](https://appshunter.io/ios/app/1/id6757163625)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 第一種作業環境測定士 試験対策 | $1.99 | one-time |


## Frequently asked questions

### Is 危険物取扱者乙種第四類 free?

危険物取扱者乙種第四類 is free to download, with no in-app purchases.

### Is 第1種作業環境 free?

第1種作業環境 is free to download, with in-app purchases available.

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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.*