# NDT X vs Flash Studio

The clearest difference is review sentiment: NDT X at 100% against Flash Studio's 58%. NDT X also leads on ads (none vs shown) and rating (5.0 vs 4.8). Flash Studio's advantage is ratings volume (5.5K vs 3). On price, update cadence, 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.

NDT X holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Flash Studio has 5.5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of NDT X's written reviews are positive against 58% of Flash Studio's.

NDT X ships an update every 2 weeks, Flash Studio fortnightly. The most recent releases landed on October 14, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | NDT X | Flash Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ndt-x-ray-toolbox/id1291387260/reviews)** | [4.8 (5.5K ratings)](https://appshunter.io/ios/app/flash-studio/id6756779254/reviews) |
| Number of ratings | 3 | **5.5K** |
| Positive reviews | **100.0% of reviews** | 58.2% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | **Free** | Ad-supported |
| Size | 83 MB | 100 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Visiconsult X-ray Systems & Solutions GmbH](https://appshunter.io/developer/1291387259) | [浙江闪铸三维科技有限公司](https://appshunter.io/developer/999198567) |

## What reviewers say

### NDT X

[App page](https://appshunter.io/ios/app/ndt-x-ray-toolbox/id1291387260)

This app provides essential tools for x-ray calculations, including geometric and CT calculations, image viewing, and quality control. It offers explanations for formulas and supports common detectors for easier use.

**Highlights:** TIFF and DICONDE image viewer, Geometric calculations, X-ray standards support, Image quality control, CT calculations, Formula explanations, Detector selection tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Flash Studio

[App page](https://appshunter.io/ios/app/flash-studio/id6756779254)

Manage your 3D printers remotely from your smartphone. Monitor print status, view live video feeds of your printer's operations, and control multiple printers simultaneously.

**Highlights:** Remote printer monitoring, Real-time video feed, Manage grouped printers, On-the-go management, Smartphone integration

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

**In-app purchases:** none


## Frequently asked questions

### Is NDT X free?

NDT X is free to download, with no in-app purchases.

### Is Flash Studio free?

Flash Studio is free to download, with no in-app purchases.

### Which has better reviews, NDT X or Flash Studio?

NDT X is rated higher. NDT X averages 5.0 out of 5 from 3 ratings, while Flash Studio averages 4.8 from 5.5K ratings.

### Do NDT X or Flash Studio have ads?

Flash Studio shows ads; NDT X does not.

### Which is updated more often, NDT X or Flash Studio?

NDT X ships an update every 2 weeks, and Flash Studio fortnightly. Most recently, NDT X was updated on October 14, 2026 and Flash Studio on October 26, 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.*