# 潜水士免許試験 合格ドリル vs 進数ノック

The clearest difference is in-app purchases: 潜水士免許試験 合格ドリル at none against 進数ノック's 1. 潜水士免許試験 合格ドリル also leads on iOS requirement (15.1 vs 17.0). 進数ノック's advantage is ads (none vs shown) and update cadence (daily vs every 2 months). On price and device support there is nothing between them.

Both are free to download. 進数ノック sells 1 one-off in-app purchase. 潜水士免許試験 合格ドリル asks for nothing beyond the download.

潜水士免許試験 合格ドリル ships an update every 2 months, 進数ノック daily. The most recent releases landed on October 12, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 潜水士免許試験 合格ドリル | 進数ノック |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Daily** |
| Size | 53 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AFTW LLC](https://appshunter.io/developer/1886356149) | [Hikaru Hakata](https://appshunter.io/developer/6796209163) |

## What reviewers say

### 潜水士免許試験 合格ドリル

[App page](https://appshunter.io/ios/app/id6772105356)

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

**In-app purchases:** none


### 進数ノック

[App page](https://appshunter.io/ios/app/radixdrill/id6796209161)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示 | $1.99 | one-time |


## Frequently asked questions

### Is 潜水士免許試験 合格ドリル free?

潜水士免許試験 合格ドリル is free to download, with no in-app purchases.

### Is 進数ノック free?

進数ノック is free to download, with in-app purchases available.

### Do 潜水士免許試験 合格ドリル or 進数ノック have ads?

潜水士免許試験 合格ドリル shows ads; 進数ノック does not.

### Which is updated more often, 潜水士免許試験 合格ドリル or 進数ノック?

潜水士免許試験 合格ドリル ships an update every 2 months, and 進数ノック daily. Most recently, 潜水士免許試験 合格ドリル was updated on October 12, 2026 and 進数ノック on October 19, 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.*