# 大気関係第３種 vs 機械保全1級 機械系 合格ドリル

大気関係第３種 and 機械保全1級 機械系 合格ドリル are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 大気関係第３種 sells 1 one-off in-app purchase and 機械保全1級 機械系 合格ドリル sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 大気関係第３種 | 機械保全1級 機械系 合格ドリル |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 5 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TAKAYUKI OOTA](https://appshunter.io/developer/1855196437) | [Shunya Iwasaki](https://appshunter.io/developer/1796095304) |

## What reviewers say

### 大気関係第３種

[App page](https://appshunter.io/ios/app/id6758421053)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 大気関係第３種公害防止管理者 試験対策 | $1.99 | one-time |


### 機械保全1級 機械系 合格ドリル

[App page](https://appshunter.io/ios/app/1/id6797353044)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム（全機能解放・買い切り） | $14.99 | one-time |


## Frequently asked questions

### Is 大気関係第３種 free?

大気関係第３種 is free to download, with in-app purchases available.

### Is 機械保全1級 機械系 合格ドリル free?

機械保全1級 機械系 合格ドリル is free to download, with in-app purchases available.

### Do 大気関係第３種 or 機械保全1級 機械系 合格ドリル have ads?

Neither 大気関係第３種 nor 機械保全1級 機械系 合格ドリル shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*