Fox RT Guide vs NDT Nation
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Fox RT Guide
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Fox RT Guide is the essential companion app for NDT radiography professionals. Whether you work with Film, CR (Computed Radiography), or DR (Digital Radiography) systems, this app puts critical tools and references right in your pocket ā on-site and beyond. EXPOSURE CALCULATOR ⢠Recommended mode: Enter material, thickness, and distance ā get optimized kV, mA, and focal spot recommendations ⢠Manual mode: Calculate exposure times for X-Ray and isotope sources (Ir-192, Co-60, Se-75, Tm-170) ⢠Supports Film, CR, and DR detectors with ISO 17636-2 compliant geometric unsharpness (Ug) validation ⢠Save and reload up to 10 calculations STANDARDS REFERENCE ⢠Quick-access database of 15+ major NDT standards ⢠Covers ASME, ASTM, ISO, AWS, API, and ASNT codes ⢠Key requirements summary with direct links to official standards bodies TECHNIQUE CHARTS ⢠Material-specific exposure parameters for Carbon Steel, Stainless Steel, and Aluminum ⢠Charts for X-Ray, Ir-192, and Co-60 sources ⢠Separate data for Film (ISO 17636-1), CR, and DR (ISO 17636-2) DICOM / DICONDE IMAGE VIEWER ⢠Open DICOM and standard image files ⢠Window/Level adjustment, zoom, pan, rotate, and flip controls ⢠On-image measurement tool with mm/inch calibration ⢠Full DICOM tag browser with search IQI / PENETRAMETER GUIDE ⢠ASTM E1025 hole-type penetrameter lookup ⢠ISO 19232-1 Wire IQI (W1āW19) reference ⢠ISO 19232-5 Duplex Wire IQI (D1āD13) with SRb requirements SAFETY CALCULATOR ⢠Safe distance calculations for X-Ray and isotope sources ⢠Shielding requirements for lead, concrete, and steel ⢠ALARA guidelines and dose rate reference ADDITIONAL TOOLS ⢠Film Selection Guide ā thickness-based film recommendations per ISO 11699-1 ⢠Density Guide ā interactive density reference with acceptance ranges ⢠Geometric Unsharpness Calculator ā Ug calculation with ISO 17636-2 quality ratings ⢠Defect Interpretation Guide ā weld, casting, forging, and processing defects with acceptance criteria per ASME, AWS, API, and ISO codes ⢠Unit Converter ā Length, Radioactivity, Dose, Pressure, Temperature, Film Density, and Distance ⢠Detector Performance ā DQE, MTF tables, calibration procedures, and Film vs CR vs DR comparison RT QUIZ ⢠60 questions across 6 categories for ASNT Level I, II, and III certification preparation ⢠Categories: RT Fundamentals, Equipment & Setup, Image Quality, Standards & Codes, Safety, and Defect Interpretation ⢠Instant feedback with detailed explanations ⢠Score tracking with category breakdown Designed by Foxes, for NDT professionals. Ā© 2026 Mind Fox Software Solutions Pvt Ltd
NDT Nation
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NDT Nation is the field reference built by RT people, for RT people: 60 verified calculators, a standards reference library and three full exam-prep banks ā all working offline at the shot location. 60 CALCULATORS ⢠RT ā film density by code, R-factors, source decay, exposure correction, geometric unsharpness, boundary estimate, blow factor, wall shot selector, IQI/density check, % sensitivity, HVL attenuation, inverse-square, isotope reference, film development, pipe schedule ⢠UT / PAUT / TOFD ā wavelength, near field, beam spread, Snell's law, angle-beam path, dB/amplitude, attenuation correction, thickness by echo, temperature correction, scan calculator, DAC/TCG helper, wedge refraction, TOFD setup ⢠MT ā coil shot, prod current, yoke lift test, demagnetization check ⢠ET ā depth of penetration, fill factor, phase/impedance, limit frequency ⢠PT / VT ā dwell time and dwell grid, lighting, coverage check ⢠Welding ā heat input, fillet weld size, pipe hi-lo, weld symbols, preheat/interpass, PWHT time and temperature, undercut acceptance, camber ⢠Materials ā carbon equivalent, bolt torque, weld volume, pipe clock position, F#/P# reference, hardness conversion, alloy/PMI reference, unit and temperature conversion ACCEPTANCE CRITERIA + INDICATION EVALUATION Pick the code, edition, pipe size and wall thickness and get the tolerance for each anomaly type computed for your actual wall ā with a real reference radiograph on the rows that have one. The API 1104 engine evaluates an indication against the individual-length, worst-12-inch aggregate and percent-of-weld-length tests and tells you which one it fails. FILM INTERPRETATION WITH REAL RADIOGRAPHS Ten defect categories ā incomplete penetration, IP due to high-low, elongated slag, porosity, cracks, burn through, hollow bead, internal and external undercut, incomplete fusion ā each with real annotated films you can pinch-zoom, plus what it looks like on film and how it is graded. REFERENCE LIBRARY API 510, API 570, API 653, API 571 damage mechanisms, WPS/PQR to ASME IX, PT and UT code guides, PMI guide, CUI/coating and electrode storage ā written in our own words from the governing standards and cited, never copied. EXAM PREP ā 750 QUESTIONS ⢠State card / radiation safety ā 200 questions plus study notes and a timed mock on the real blueprint ⢠CWI ā 351 questions plus bullet study cards ⢠ASNT Level II ā 199 questions across UT, RT, MT, PT and ET Every answer comes with the explanation and the standard behind it. BUILT FOR THE FIELD ⢠Fully offline ā no signal needed at the shot ⢠Big-screen mode: mirror your phone to a TV or monitor over AirPlay or HDMI for a film-density readout the whole crew can read across the bay ⢠Customizable home ā pin the tools you use, most-used surface automatically ⢠Dark, one-hand interface that reads in bright sun or a dark bay Every formula is built from the governing standard ā ASME, API, AWS, ASTM, ASNT, NCRP ā and cited, not copied from another app. Reference only. This app does not replace your governing code, your written procedure or certified personnel. Radiation safety outputs are planning aids: always verify with a calibrated survey meter and follow your radiation safety program.
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Verdict
The clearest difference is update cadence: NDT Nation at daily against Fox RT Guide's every 6 weeks. NDT Nation also leads on iOS requirement (15.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fox RT Guide ships an update every 6 weeks, NDT Nation daily. The most recent releases landed on October 12, 2026 and October 18, 2026 respectively.
| Parameter | Fox RT Guide | NDT Nation |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Daily ā better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod ā better |
| Requires iOS | 18.6 | 15.0 ā better |
| Further details ā not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Mind Fox Software Solutions Private Limited | Marcus Cook |
In-app purchases
Fox RT Guide
No in-app purchases
NDT Nation
No in-app purchases







