# 第二種冷凍機械責任者 | 2026年対策問題 vs Denken 3rd Class

The clearest difference is price: Denken 3rd Class at Free against 第二種冷凍機械責任者 | 2026年対策問題's $2.99. Denken 3rd Class also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.0 vs 17.0). 第二種冷凍機械責任者 | 2026年対策問題's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Denken 3rd Class is free to download; 第二種冷凍機械責任者 | 2026年対策問題 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

第二種冷凍機械責任者 | 2026年対策問題 ships an update every 3 weeks, Denken 3rd Class daily. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 第二種冷凍機械責任者 | 2026年対策問題 | Denken 3rd Class |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Paid | — |
| Size | 6 MB | 65 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) | [hyuncheol seo](https://appshunter.io/developer/6797554122) |

## What reviewers say

### 第二種冷凍機械責任者 | 2026年対策問題

[App page](https://appshunter.io/ios/app/2026/id6777672583)

This app offers 800 original practice questions for the Type 2 Refrigeration Engineer exam. It organizes content by topic, provides detailed explanations for correct and incorrect answers, and supports offline use. The app aims to help users understand concepts rather than just memorize them.

**Highlights:** 800 original practice questions, Detailed explanations for answers, Topic-based learning, Randomized question order, Review incorrect answers, Offline access

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

**In-app purchases:** none


### Denken 3rd Class

[App page](https://appshunter.io/ios/app/denken-3rd-class-passrun/id6809243739)

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

**In-app purchases:** none


## Frequently asked questions

### Is 第二種冷凍機械責任者 | 2026年対策問題 free?

第二種冷凍機械責任者 | 2026年対策問題 costs $2.99, with no in-app purchases.

### Is Denken 3rd Class free?

Denken 3rd Class is free to download, with no in-app purchases.

### Do 第二種冷凍機械責任者 | 2026年対策問題 or Denken 3rd Class have ads?

Denken 3rd Class shows ads; 第二種冷凍機械責任者 | 2026年対策問題 does not.

### Which is updated more often, 第二種冷凍機械責任者 | 2026年対策問題 or Denken 3rd Class?

第二種冷凍機械責任者 | 2026年対策問題 ships an update every 3 weeks, and Denken 3rd Class daily. Most recently, 第二種冷凍機械責任者 | 2026年対策問題 was updated on October 25, 2026 and Denken 3rd Class on October 18, 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.*