# ガス主任技術者（甲種） vs 危険物乙4コンプリートマスター解説付

ガス主任技術者（甲種） and 危険物乙4コンプリートマスター解説付 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. ガス主任技術者（甲種） sells 1 one-off in-app purchase and 危険物乙4コンプリートマスター解説付 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ガス主任技術者（甲種） | 危険物乙4コンプリートマスター解説付 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 5 MB | 108 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [BEAK,K.K.](https://appshunter.io/developer/1808079760) |

## What reviewers say

### ガス主任技術者（甲種）

[App page](https://appshunter.io/ios/app/id6757460088)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ガス主任技術者（甲種） 試験対策 | $4.99 | one-time |


### 危険物乙4コンプリートマスター解説付

[App page](https://appshunter.io/ios/app/4/id6772826132)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 危険物乙4サブスクリプション | $2.99 | per month |
| 危険物乙4買い切りプラン | $22.99 | one-time |


## Frequently asked questions

### Is ガス主任技術者（甲種） free?

ガス主任技術者（甲種） is free to download, with in-app purchases available.

### Is 危険物乙4コンプリートマスター解説付 free?

危険物乙4コンプリートマスター解説付 is free to download, with in-app purchases available.

### Do ガス主任技術者（甲種） or 危険物乙4コンプリートマスター解説付 have ads?

Neither ガス主任技術者（甲種） nor 危険物乙4コンプリートマスター解説付 shows ads.

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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.*