# Ko4Study vs 消防設備士4類ドリル − 製図・鑑別対策

The clearest difference is price: 消防設備士4類ドリル − 製図・鑑別対策 at Free against Ko4Study's $3.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

消防設備士4類ドリル − 製図・鑑別対策 is free to download; Ko4Study costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ko4Study ships an update every 10 days, 消防設備士4類ドリル − 製図・鑑別対策 every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Ko4Study | 消防設備士4類ドリル − 製図・鑑別対策 |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 9 days** |
| Size | 20 MB | 26 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TANI YUICHIRO](https://appshunter.io/developer/6782828819) | [Moeki Kozawa](https://appshunter.io/developer/1770452138) |

## What reviewers say

### Ko4Study

[App page](https://appshunter.io/ios/app/ko4study-fire-exam-japan/id6782828817)

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

**In-app purchases:** none


### 消防設備士4類ドリル − 製図・鑑別対策

[App page](https://appshunter.io/ios/app/4/id6796460303)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ko4Study free?

Ko4Study costs $3.99, with no in-app purchases.

### Is 消防設備士4類ドリル − 製図・鑑別対策 free?

消防設備士4類ドリル − 製図・鑑別対策 is free to download, with no in-app purchases.

### Do Ko4Study or 消防設備士4類ドリル − 製図・鑑別対策 have ads?

Neither Ko4Study nor 消防設備士4類ドリル − 製図・鑑別対策 shows ads.

### Which is updated more often, Ko4Study or 消防設備士4類ドリル − 製図・鑑別対策?

Ko4Study ships an update every 10 days, and 消防設備士4類ドリル − 製図・鑑別対策 every 9 days. Most recently, Ko4Study was updated on October 24, 2026 and 消防設備士4類ドリル − 製図・鑑別対策 on October 24, 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.*