Comparison

NDT Master vs Euler Gamma

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NDT Master

This app streamlines ultrasonic testing for field inspections. It offers rapid weld rating, DAC/TCG curve building, 3D beam simulation, and OCR parameter capture. Includes essential UT calculators and material presets for efficient flaw detection and setup confidence.

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

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

About

Euler Gamma

Features
Read full description

The all-in-one calculator suite for industrial gamma radiography professionals. Whether you're planning an exposure, calculating safety boundaries, or verifying ASME compliance — Euler Gamma delivers accurate results instantly, right from your pocket. Trusted by NDT technicians, RSOs, and radiography crews worldwide. WHAT YOU GET • Decay Calculator — Activity remaining after any elapsed time for Ir-192, Se-75, and Co-60 • Dose Rate Calculator — Inverse-square law with real-time results in mR/hr, µSv/hr, and more • Barricade Calculator — Safety boundary distances per NRC 10 CFR 20 guidelines • HVL Shielding Calculator — Half-Value Layer attenuation for Steel, Lead, Concrete, and more • Unsharpness Calculator — Geometric unsharpness (Ug) with ASME V Article 2 pass/fail checks • Reference Data — Built-in gamma constants, material properties, and occupancy factors BUILT FOR THE FIELD • Works offline — no internet required at the job site • Clean, fast interface designed for one-handed use • Supports both SI and US customary units • Results you can screenshot and share instantly COMPLIANCE YOU CAN TRUST Physical constants validated against NIST, ICRP, and NRC publications. ASME Section V limits built-in. Know your numbers are right — every single time. Download Euler Gamma today and make every shot safer and more precise.

Screenshots

NDT Master4 screens
Euler Gamma4 screens

Verdict

The call

The clearest difference is in-app purchases: Euler Gamma at none against NDT Master's 1. NDT Master's advantage is iOS requirement (15 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. NDT Master sells 1 one-off in-app purchase. Euler Gamma asks for nothing beyond the download.

UpkeepUpdate frequency

NDT Master ships an update every 2 weeks, Euler Gamma every 9 days. The most recent releases landed on October 15, 2026 and September 25, 2026 respectively.

Scorecard2 real differences · 8 level
NDT Master versus Euler Gamma: the parameters behind the verdict, then further details
ParameterNDT MasterEuler Gamma
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15 — better17.0
Further details — not scored
Size20 MB14 MB
Age rating4+4+
Developer雪 蔺音 卢

In-app purchases

1 purchases

NDT Master

One-time1
  • Professional Unlock$9.99
None

Euler Gamma

No in-app purchases

Questions

Is NDT Master free?
NDT Master is free to download, with in-app purchases available.
Is Euler Gamma free?
Euler Gamma is free to download, with no in-app purchases.
Do NDT Master or Euler Gamma have ads?
Neither NDT Master nor Euler Gamma shows ads.
Which is updated more often, NDT Master or Euler Gamma?
NDT Master ships an update every 2 weeks, and Euler Gamma every 9 days. Most recently, NDT Master was updated on October 15, 2026 and Euler Gamma on September 25, 2026.

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