# NDI学習 vs エックス線作業主任者 | 2026年対策問題

The clearest difference is price: NDI学習 at Free against エックス線作業主任者 | 2026年対策問題's $1.99. NDI学習 also leads on update cadence (every 6 days vs every 3 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

NDI学習 is free to download; エックス線作業主任者 | 2026年対策問題 costs $1.99 up front. 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 | 2026年対策問題 every 3 weeks. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | NDI学習 | エックス線作業主任者 | 2026年対策問題 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 5 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KAZUHITO SHINOZUKA](https://appshunter.io/developer/1562330139) | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) |

## 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 | 2026年対策問題

[App page](https://appshunter.io/ios/app/2026/id6774425768)

**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 | 2026年対策問題 free?

エックス線作業主任者 | 2026年対策問題 costs $1.99, with no in-app purchases.

### Do NDI学習 or エックス線作業主任者 | 2026年対策問題 have ads?

Neither NDI学習 nor エックス線作業主任者 | 2026年対策問題 shows ads.

### Which is updated more often, NDI学習 or エックス線作業主任者 | 2026年対策問題?

NDI学習 ships an update every 6 days, and エックス線作業主任者 | 2026年対策問題 every 3 weeks. Most recently, NDI学習 was updated on October 10, 2026 and エックス線作業主任者 | 2026年対策問題 on October 7, 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.*