# 水質関係第４種 vs 下水道技術検定第3種 合格ドリル

The clearest difference is in-app purchases: 下水道技術検定第3種 合格ドリル at none against 水質関係第４種's 1. 水質関係第４種's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 水質関係第４種 sells 1 one-off in-app purchase. 下水道技術検定第3種 合格ドリル asks for nothing beyond the download.

## The numbers

| Metric | 水質関係第４種 | 下水道技術検定第3種 合格ドリル |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Size | 5 MB | 53 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [AFTW LLC](https://appshunter.io/developer/1886356149) |

## What reviewers say

### 水質関係第４種

[App page](https://appshunter.io/ios/app/id6758494591)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 水質関係第４種公害防止管理者 試験対策 | $1.99 | one-time |


### 下水道技術検定第3種 合格ドリル

[App page](https://appshunter.io/ios/app/3/id6775067812)

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

**In-app purchases:** none


## Frequently asked questions

### Is 水質関係第４種 free?

水質関係第４種 is free to download, with in-app purchases available.

### Is 下水道技術検定第3種 合格ドリル free?

下水道技術検定第3種 合格ドリル is free to download, with no in-app purchases.

### Do 水質関係第４種 or 下水道技術検定第3種 合格ドリル have ads?

下水道技術検定第3種 合格ドリル shows ads; 水質関係第４種 does not.

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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.*