# 公害防止Pass vs 公害防止管理者 水質1種 問題集

The clearest difference is ads: 公害防止管理者 水質1種 問題集 at none against 公害防止Pass's shown. 公害防止Pass's advantage is update cadence (weekly vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 公害防止Pass sells 1 one-off in-app purchase and 公害防止管理者 水質1種 問題集 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

公害防止Pass ships an update weekly, 公害防止管理者 水質1種 問題集 fortnightly. The most recent releases landed on September 20, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 公害防止Pass | 公害防止管理者 水質1種 問題集 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Size | 43 MB | 31 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KANDK](https://appshunter.io/developer/1867080143) | [Takuro Fukuma](https://appshunter.io/developer/1896728656) |

## What reviewers say

### 公害防止Pass

[App page](https://appshunter.io/ios/app/pass/id6761719666)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $1.99 | one-time |


### 公害防止管理者 水質1種 問題集

[App page](https://appshunter.io/ios/app/1/id6792692236)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全問解放（買い切り） | $6.99 | one-time |


## Frequently asked questions

### Is 公害防止Pass free?

公害防止Pass is free to download, with in-app purchases available.

### Is 公害防止管理者 水質1種 問題集 free?

公害防止管理者 水質1種 問題集 is free to download, with in-app purchases available.

### Do 公害防止Pass or 公害防止管理者 水質1種 問題集 have ads?

公害防止Pass shows ads; 公害防止管理者 水質1種 問題集 does not.

### Which is updated more often, 公害防止Pass or 公害防止管理者 水質1種 問題集?

公害防止Pass ships an update weekly, and 公害防止管理者 水質1種 問題集 fortnightly. Most recently, 公害防止Pass was updated on September 20, 2026 and 公害防止管理者 水質1種 問題集 on September 27, 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.*