# 高圧ガス製造保安責任者 vs 公害防止Pass

The clearest difference is ads: 高圧ガス製造保安責任者 at none against 公害防止Pass's shown. 公害防止Pass's advantage is update cadence (weekly vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 高圧ガス製造保安責任者 sells 1 one-off in-app purchase and 公害防止Pass sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

高圧ガス製造保安責任者 ships an update every 10 months, 公害防止Pass weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 高圧ガス製造保安責任者 | 公害防止Pass |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Size | 5 MB | 43 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [KANDK](https://appshunter.io/developer/1867080143) |

## What reviewers say

### 高圧ガス製造保安責任者

[App page](https://appshunter.io/ios/app/id6757625319)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高圧ガス製造保安責任者（丙種化学・特別） 試験対策 | $4.99 | one-time |


### 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 |


## Frequently asked questions

### Is 高圧ガス製造保安責任者 free?

高圧ガス製造保安責任者 is free to download, with in-app purchases available.

### Is 公害防止Pass free?

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

### Do 高圧ガス製造保安責任者 or 公害防止Pass have ads?

公害防止Pass shows ads; 高圧ガス製造保安責任者 does not.

### Which is updated more often, 高圧ガス製造保安責任者 or 公害防止Pass?

高圧ガス製造保安責任者 ships an update every 10 months, and 公害防止Pass weekly. Most recently, 高圧ガス製造保安責任者 was updated on November 5, 2026 and 公害防止Pass on October 31, 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.*