# エックス線作業主任者試験lite　りすさんシリーズ vs NDI学習

The clearest difference is ads: NDI学習 at none against エックス線作業主任者試験lite　りすさんシリーズ's shown. NDI学習 also leads on update cadence (every 6 days vs every 15 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

エックス線作業主任者試験lite　りすさんシリーズ ships an update every 15 months, NDI学習 every 6 days. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | エックス線作業主任者試験lite　りすさんシリーズ | NDI学習 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 15 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 6 MB |
| Requires iOS | 18.6 | **17** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kazuki Baba](https://appshunter.io/developer/903350438) | [KAZUHITO SHINOZUKA](https://appshunter.io/developer/1562330139) |

## What reviewers say

### エックス線作業主任者試験lite　りすさんシリーズ

[App page](https://appshunter.io/ios/app/lite/id1113933088)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is エックス線作業主任者試験lite　りすさんシリーズ free?

エックス線作業主任者試験lite　りすさんシリーズ is free to download, with no in-app purchases.

### Is NDI学習 free?

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

### Do エックス線作業主任者試験lite　りすさんシリーズ or NDI学習 have ads?

エックス線作業主任者試験lite　りすさんシリーズ shows ads; NDI学習 does not.

### Which is updated more often, エックス線作業主任者試験lite　りすさんシリーズ or NDI学習?

エックス線作業主任者試験lite　りすさんシリーズ ships an update every 15 months, and NDI学習 every 6 days. Most recently, エックス線作業主任者試験lite　りすさんシリーズ was updated on September 21, 2026 and NDI学習 on September 8, 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.*