# 危険物取扱者乙種第四類 vs 危険物乙4Pass

The clearest difference is in-app purchases: 危険物取扱者乙種第四類 at none against 危険物乙4Pass's 1. 危険物取扱者乙種第四類 also leads on iOS requirement (12.0 vs 15.1). 危険物乙4Pass's advantage is update cadence (weekly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. 危険物乙4Pass sells 1 one-off in-app purchase. 危険物取扱者乙種第四類 asks for nothing beyond the download.

危険物取扱者乙種第四類 ships an update every 2 months, 危険物乙4Pass weekly. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 危険物取扱者乙種第四類 | 危険物乙4Pass |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Size | 13 MB | 43 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maiji Saito](https://appshunter.io/developer/671719488) | [KANDK](https://appshunter.io/developer/1867080143) |

## 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


### 危険物乙4Pass

[App page](https://appshunter.io/ios/app/4pass-4/id6768249746)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $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 危険物乙4Pass free?

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

### Do 危険物取扱者乙種第四類 or 危険物乙4Pass have ads?

Both 危険物取扱者乙種第四類 and 危険物乙4Pass show ads.

### Which is updated more often, 危険物取扱者乙種第四類 or 危険物乙4Pass?

危険物取扱者乙種第四類 ships an update every 2 months, and 危険物乙4Pass weekly. Most recently, 危険物取扱者乙種第四類 was updated on October 11, 2026 and 危険物乙4Pass on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*