# 公害防止管理者大気4種対策 vs 第三種冷凍機械責任者 過去問対策 2026

The clearest difference is price: 第三種冷凍機械責任者 過去問対策 2026 at Free against 公害防止管理者大気4種対策's $4.99. 第三種冷凍機械責任者 過去問対策 2026 also leads on iOS requirement (13.0 vs 15.1). 公害防止管理者大気4種対策's advantage is in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

第三種冷凍機械責任者 過去問対策 2026 is free to download; 公害防止管理者大気4種対策 costs $4.99 up front. 第三種冷凍機械責任者 過去問対策 2026 sells 1 one-off in-app purchase. 公害防止管理者大気4種対策 asks for nothing beyond the download.

公害防止管理者大気4種対策 ships an update monthly, 第三種冷凍機械責任者 過去問対策 2026 every 6 weeks. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 公害防止管理者大気4種対策 | 第三種冷凍機械責任者 過去問対策 2026 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 25 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [satoshi yoshida](https://appshunter.io/developer/1873856165) | [YUKI SHIIYAMA](https://appshunter.io/developer/1867294802) |

## What reviewers say

### 公害防止管理者大気4種対策

[App page](https://appshunter.io/ios/app/4/id6775329326)

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

**In-app purchases:** none


### 第三種冷凍機械責任者 過去問対策 2026

[App page](https://appshunter.io/ios/app/2026/id6794944515)

This app helps users prepare for the Third Class Refrigeration Engineer exam with a comprehensive collection of past questions. It covers 17 years of exams, totaling 595 questions, and offers a simple tap-to-answer format for efficient learning.

**Highlights:** 17 years of past questions, 595 total questions, Covers laws and safety management technology, Simple tap-to-answer interface, iPhone and iPad compatible

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO機能をすべて解放 | $5.99 | one-time |


## Frequently asked questions

### Is 公害防止管理者大気4種対策 free?

公害防止管理者大気4種対策 costs $4.99, with no in-app purchases.

### Is 第三種冷凍機械責任者 過去問対策 2026 free?

第三種冷凍機械責任者 過去問対策 2026 is free to download, with in-app purchases available.

### Do 公害防止管理者大気4種対策 or 第三種冷凍機械責任者 過去問対策 2026 have ads?

Neither 公害防止管理者大気4種対策 nor 第三種冷凍機械責任者 過去問対策 2026 shows ads.

### Which is updated more often, 公害防止管理者大気4種対策 or 第三種冷凍機械責任者 過去問対策 2026?

公害防止管理者大気4種対策 ships an update monthly, and 第三種冷凍機械責任者 過去問対策 2026 every 6 weeks. Most recently, 公害防止管理者大気4種対策 was updated on October 11, 2026 and 第三種冷凍機械責任者 過去問対策 2026 on October 25, 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.*