# NDT Master: UT Weld Calculator — Ultrasonic Testing, Inspection

> Field ultrasonic testing calculator and workflow tool with beam simulation. (iPhone/iPad app by 雪 蔺.)

- Source: https://appshunter.io/ios/app/ndt-master-ut-weld-calculator/id6762549446 (this page in markdown: same URL + `.md`)
- Developer: [雪 蔺](https://appshunter.io/developer/1853712836)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 3.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15 · 20 MB
- Languages: French (France), Afrikaans, German (Germany), American English, Arabic, Catalan, Chinese (Simplified, China), Chinese (Traditional, Taiwan), Korean, Croatian and 25 more
- Released: 2026-04-22
- Data updated: 2026-10-15
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ndt-master-ut-weld-calculator/id6762549446/reviews.md

## What is NDT Master?

NDT Master is built for field ultrasonic testing workflows. It brings AWS D-Rating, DAC/TCG curve building, 3D beam simulation, OCR parameter capture, and practical UT calculators into one offline-first app.

Core field workflows
- AWS D-Rating in 5 Seconds: Fast weld indication workflow for field UT
- Build DAC/TCG Curves Fast: Plot reference echoes and gain table instantly
- Scan Readings. Auto-Fill Parameters.: OCR maps velocity, MHz and dB in seconds
- Locate Flaws Faster: Instant depth and projection outputs
- Critical Angles at a Glance: Snell + beam spread for setup confidence
- Beam Spread You Can Trust: Visualize setup impact before inspection starts

Tools included
- 9 UT calculators: Wavelength, Near Field, Beam Spread, Flaw Location, Snell's Law, ToFD PCS, dB Calc, Acoustic Impedance, Resonance.
- Material presets for steel, aluminum, stainless steel, and common inspection setup.
- Code-aware workflows for weld inspection decisions, with AWS and ASME terminology kept visible.

Offline and private
- Built for Real Field Work: Local data, no account, offline-first workflow

## Key features

- AWS D-Rating in 5 Seconds
- DAC/TCG Curve Building
- 3D Beam Simulation
- OCR Parameter Capture
- 9 UT Calculators
- Offline-First Workflow

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Professional Unlock | $9.99 | one-time |


## Is NDT Master safe?

Not enough ratings yet to assess NDT Master.

## Is NDT Master legit?

NDT Master: UT Weld Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for NDT Master is 65 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ndt-master-ut-weld-calculator/id6762549446/reviews.md

### 1/5 — Measurement

*2026-10-08*

Will not change from metric to imperial,

**Developer response:** Thanks for reporting this — you were right, and it wasn't your mistake. Version 1.6 fixes it: units now follow your device region automatically (imperial by default in the US), and several screens that ignored your selection — the dashboard last-scan card, the quick-edit velocity field, and the impedance, Snell's law and resonance calculators — now convert correctly. The "Imperial" option had also been mistranslated in 18 languages. Please update to 1.6 and check Settings → General → Units; if it still shows Metric, tap Imperial and the app will remember it. If anything is still wrong, email st67891@gmail.com with your device model and iOS version. And if 1.6 does fix it, I'd be very grateful if you'd consider revisiting your rating — only if you feel it's earned.

## Frequently asked questions about NDT Master

### What is NDT Master used for?

NDT Master is designed for field ultrasonic testing workflows. It helps with weld indication rating, building DAC/TCG curves, 3D beam simulation, and capturing inspection parameters using OCR.

### Does NDT Master have ads?

No, NDT Master does not contain advertisements. It is designed to provide an uninterrupted experience for field inspections.

### What calculators are included in NDT Master?

NDT Master includes 9 UT calculators: Wavelength, Near Field, Beam Spread, Flaw Location, Snell's Law, ToFD PCS, dB Calc, Acoustic Impedance, and Resonance.

### Can NDT Master be used offline?

Yes, NDT Master is built with an offline-first workflow, meaning it is designed to function effectively in the field without an internet connection.

### What devices support NDT Master?

NDT Master is supported on iPhone, iPad, and iPod devices, making it accessible for a range of Apple mobile users.

### How often is NDT Master updated?

The latest version, 1.6, was released on October 12, 2026, indicating recent development activity. Users can expect ongoing support and potential updates.

### Is NDT Master suitable for beginners?

While NDT Master offers advanced features like beam simulation and code-aware workflows, its comprehensive nature and specific terminology might be best suited for users with some background in ultrasonic testing.

### What is the age rating for NDT Master?

NDT Master has an age rating of 4+, making it appropriate for a wide range of users, though its technical nature is more relevant to professionals.

## Version history (last 5 releases)

### 1.6 — 2026-10-12

- Units now follow your device region automatically (imperial by default in the US, Liberia and Myanmar).
- Fixed unit conversion and display in the dashboard and calculators.
- Corrected the imperial unit-system label in 18 languages.

### 1.5 — 2026-10-01

- Fixed calculation accuracy in velocity calibration, TOFD and flaw location.
- Added PDF and CSV report export.
- Improved OCR recognition and app performance.

### 1.4 — 2026-06-24

- Optimized the OCR algorithm.

### 1.3 — 2026-05-19

- Added App Store optimized screenshots for iPhone and iPad.
- Improved ASO copy for offline privacy and field workflow clarity.
- Refined onboarding messaging for UT inspectors.

### 1.2 — 2026-05-11

- Added App Store optimized screenshots for iPhone and iPad.
- Improved ASO copy for offline privacy and field workflow clarity.
- Refined onboarding messaging for UT inspectors.

## Apps similar to NDT Master

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [UTCal](https://appshunter.io/ios/app/utcal/id6762418371) | — | Free | Utilities |
| [NDT Helper](https://appshunter.io/ios/app/ndt-helper/id6758745296) | — | Free | Utilities |
| [NDT Toolbox](https://appshunter.io/ios/app/ndt-toolbox/id6749625848) | — | Free | Utilities |
| [Euler Gamma: NDT Calculator](https://appshunter.io/ios/app/euler-gamma-ndt-calculator/id6772123721) | — | Free | Utilities |
| [Fox RT Guide](https://appshunter.io/ios/app/fox-rt-guide/id6761904066) | — | Free | Utilities |
| [NDT X-ray Toolbox](https://appshunter.io/ios/app/ndt-x-ray-toolbox/id1291387260) | 5.0 (3) | Free | Utilities |

## More apps by 雪 蔺

- [Radix Binary Converter](https://appshunter.io/ios/app/radix-binary-converter/id6755433515)
- [Hardness Converter HRC HV HB](https://appshunter.io/ios/app/hardness-converter-hrc-hv-hb/id6755652487)
- [Percentage Calculator Quick%](https://appshunter.io/ios/app/percentage-calculator-quick/id6755659954)
- [SatsClock: Bitcoin Block Clock](https://appshunter.io/ios/app/satsclock-bitcoin-block-clock/id6756977455)
- [Planetary Hours - Astro Clock](https://appshunter.io/ios/app/planetary-hours-astro-clock/id6757678864)
- [Winmail.dat Opener: Pro Reader](https://appshunter.io/ios/app/winmaildat-opener-pro-reader/id6758252704)

All apps by 雪 蔺: https://appshunter.io/developer/1853712836

## Related topics

[ndt calculator](https://appshunter.io/ios/topics/ndt-calculator)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-15.*