# NDI学習 vs エックス線作業主任者試験問題集 Lite

The clearest difference is update cadence: NDI学習 at every 6 days against エックス線作業主任者試験問題集 Lite's every 5 months. NDI学習 also leads on iOS requirement (17 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NDI学習 ships an update every 6 days, エックス線作業主任者試験問題集 Lite every 5 months. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | NDI学習 | エックス線作業主任者試験問題集 Lite |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 2 MB |
| Requires iOS | **17** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KAZUHITO SHINOZUKA](https://appshunter.io/developer/1562330139) | [Ammi Sato](https://appshunter.io/developer/1895334718) |

## What reviewers say

### NDI学習

[App page](https://appshunter.io/ios/app/ndi/id1562330137)

Practice questions for the JIS Z 2305 non-destructive testing technician exam (Level 2). Covers ultrasonic, penetrant, magnetic particle, radiographic, and eddy current testing. All learning features and questions are available without in-app purchases.

**Highlights:** Non-destructive testing exam practice, Covers multiple NDT methods, Detailed explanations, All content accessible for free, Ad removal in-app purchase

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

**In-app purchases:** none


### エックス線作業主任者試験問題集 Lite

[App page](https://appshunter.io/ios/app/lite/id6755924940)

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

**In-app purchases:** none


## Frequently asked questions

### Is NDI学習 free?

NDI学習 is free to download, with no in-app purchases.

### Is エックス線作業主任者試験問題集 Lite free?

エックス線作業主任者試験問題集 Lite is free to download, with no in-app purchases.

### Do NDI学習 or エックス線作業主任者試験問題集 Lite have ads?

Neither NDI学習 nor エックス線作業主任者試験問題集 Lite shows ads.

### Which is updated more often, NDI学習 or エックス線作業主任者試験問題集 Lite?

NDI学習 ships an update every 6 days, and エックス線作業主任者試験問題集 Lite every 5 months. Most recently, NDI学習 was updated on September 8, 2026 and エックス線作業主任者試験問題集 Lite on September 22, 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.*