# ガス溶接作業主任者 vs 第二種作業環境測定士 | 2026年対策問題

The clearest difference is price: ガス溶接作業主任者 at Free against 第二種作業環境測定士 | 2026年対策問題's $1.99. ガス溶接作業主任者 also leads on update cadence (every 6 days vs every 2 months). 第二種作業環境測定士 | 2026年対策問題's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

ガス溶接作業主任者 is free to download; 第二種作業環境測定士 | 2026年対策問題 costs $1.99 up front. ガス溶接作業主任者 sells 1 one-off in-app purchase. 第二種作業環境測定士 | 2026年対策問題 asks for nothing beyond the download.

ガス溶接作業主任者 ships an update every 6 days, 第二種作業環境測定士 | 2026年対策問題 every 2 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | ガス溶接作業主任者 | 第二種作業環境測定士 | 2026年対策問題 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Freemium | — |
| Size | 5 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) |

## What reviewers say

### ガス溶接作業主任者

[App page](https://appshunter.io/ios/app/id6757180464)

This app provides comprehensive study materials for the Certified Gas Welder exam. It features approximately 500 practice questions with detailed explanations, progress tracking, and flexible study modes. Learn efficiently anytime, anywhere, even offline.

**Highlights:** 500+ practice questions, Detailed explanations, Progress tracking, Customizable study modes, Offline access, Intuitive user interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ガス溶接作業主任者 試験対策 | $1.99 | one-time |


### 第二種作業環境測定士 | 2026年対策問題

[App page](https://appshunter.io/ios/app/2026/id6775638393)

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

**In-app purchases:** none


## Frequently asked questions

### Is ガス溶接作業主任者 free?

ガス溶接作業主任者 is free to download, with in-app purchases available.

### Is 第二種作業環境測定士 | 2026年対策問題 free?

第二種作業環境測定士 | 2026年対策問題 costs $1.99, with no in-app purchases.

### Do ガス溶接作業主任者 or 第二種作業環境測定士 | 2026年対策問題 have ads?

Neither ガス溶接作業主任者 nor 第二種作業環境測定士 | 2026年対策問題 shows ads.

### Which is updated more often, ガス溶接作業主任者 or 第二種作業環境測定士 | 2026年対策問題?

ガス溶接作業主任者 ships an update every 6 days, and 第二種作業環境測定士 | 2026年対策問題 every 2 months. Most recently, ガス溶接作業主任者 was updated on October 31, 2026 and 第二種作業環境測定士 | 2026年対策問題 on October 31, 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.*