# 消防設備士乙6｜鑑別暗記 vs Denken 3rd Class

The clearest difference is ads: 消防設備士乙6｜鑑別暗記 at none against Denken 3rd Class's shown. Denken 3rd Class's advantage is update cadence (daily vs monthly) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

消防設備士乙6｜鑑別暗記 ships an update monthly, Denken 3rd Class daily. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 消防設備士乙6｜鑑別暗記 | Denken 3rd Class |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Daily** |
| Size | 4 MB | 65 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHINOBU MIYAHIRA](https://appshunter.io/developer/6782739570) | [hyuncheol seo](https://appshunter.io/developer/6797554122) |

## What reviewers say

### 消防設備士乙6｜鑑別暗記

[App page](https://appshunter.io/ios/app/6/id6793787248)

**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 消防設備士乙6｜鑑別暗記 free?

消防設備士乙6｜鑑別暗記 is free to download, with no in-app purchases.

### Is Denken 3rd Class free?

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

### Do 消防設備士乙6｜鑑別暗記 or Denken 3rd Class have ads?

Denken 3rd Class shows ads; 消防設備士乙6｜鑑別暗記 does not.

### Which is updated more often, 消防設備士乙6｜鑑別暗記 or Denken 3rd Class?

消防設備士乙6｜鑑別暗記 ships an update monthly, and Denken 3rd Class daily. Most recently, 消防設備士乙6｜鑑別暗記 was updated on October 17, 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.*