# Ko4Study vs 消防設備士 甲4 試験対策

The clearest difference is in-app purchases: Ko4Study at none against 消防設備士 甲4 試験対策's 1. Ko4Study also leads on price ($3.99 vs $9.99). On update cadence, ads, device support and iOS requirement there is nothing between them.

Ko4Study costs $3.99 and 消防設備士 甲4 試験対策 $9.99 up front. 消防設備士 甲4 試験対策 sells 1 one-off in-app purchase. Ko4Study asks for nothing beyond the download.

Ko4Study ships an update every 10 days, 消防設備士 甲4 試験対策 every 8 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Ko4Study | 消防設備士 甲4 試験対策 |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 8 days** |
| Size | 20 MB | 3 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TANI YUICHIRO](https://appshunter.io/developer/6782828819) | [matsuo konan](https://appshunter.io/developer/6772919772) |

## 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 甲4 試験対策

[App page](https://appshunter.io/ios/app/4/id6786774938)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全問題解放 | $6.99 | one-time |


## Frequently asked questions

### Is Ko4Study free?

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

### Is 消防設備士 甲4 試験対策 free?

消防設備士 甲4 試験対策 costs $9.99, and also offers in-app purchases.

### Do Ko4Study or 消防設備士 甲4 試験対策 have ads?

Neither Ko4Study nor 消防設備士 甲4 試験対策 shows ads.

### Which is updated more often, Ko4Study or 消防設備士 甲4 試験対策?

Ko4Study ships an update every 10 days, and 消防設備士 甲4 試験対策 every 8 days. Most recently, Ko4Study was updated on October 24, 2026 and 消防設備士 甲4 試験対策 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.*