# 公害防止Pass vs 公害防止管理者 水質1種 合格ナビ

The clearest difference is ads: 公害防止管理者 水質1種 合格ナビ at none against 公害防止Pass's shown. 公害防止Pass's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and device support 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 合格ナビ sells 2 one-off in-app purchases. 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 合格ナビ every 8 days. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 公害防止Pass | 公害防止管理者 水質1種 合格ナビ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 8 days |
| Size | 43 MB | 3 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KANDK](https://appshunter.io/developer/1867080143) | [Shunya Iwasaki](https://appshunter.io/developer/1796095304) |

## 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 合格ナビ

[App page](https://appshunter.io/ios/app/1/id6772624961)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 実戦問題パック 2026 | $3.99 | one-time |
| プレミアム（全機能解放） | $14.99 | 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 合格ナビ free?

公害防止管理者 水質1種 合格ナビ 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 合格ナビ have ads?

公害防止Pass shows ads; 公害防止管理者 水質1種 合格ナビ does not.

### Which is updated more often, 公害防止Pass or 公害防止管理者 水質1種 合格ナビ?

公害防止Pass ships an update weekly, and 公害防止管理者 水質1種 合格ナビ every 8 days. 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 合格ナビ on September 23, 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.*