NDT Reference vs LEEA Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NDT Reference
This app provides essential mathematical formulas and constants used in various non-destructive testing (NDT) methods. It's designed for NDT practitioners and students to easily access and understand the calculations involved in radiography, ultrasonics, magnetic particle testing, and eddy current testing.
- NDT mathematics and formulae
- Radiography and radiology formulas
- Ultrasonics formulas and velocities
- Magnetic particle testing formulas
- Eddy current testing formulas
- Reference for NDT practitioners and students
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The British Institute of Non-Destructive Testing's NDT Reference App is based on the Institute's best-selling book: 'Mathematics and Formulae in NDT', edited by the late Dr Ron Halmshaw. Prepared by members of the BINDT Technical Committee, this app is planned to help NDT practitioners and students to understand and use the formulae which are employed in NDT. It contains basic useful formulae used in radiography and radiology, ultrasonics, magnetic particle testing and eddy current testing. The ultrasonics section includes some values for ultrasonic velocities for a number of materials. Additional images by storyset on Freepik (https://www.freepik.com)
LEEA Connect
This app provides lifting equipment professionals with instant access to technical guidance, documentation, news, and safety alerts. It serves as a mobile resource for LEEA members and their employees, keeping them informed with the latest updates and a comprehensive library.
- Technical guidance access
- Documentation library
- Latest news feeds
- Safety alerts
- Information for members
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LEEA Connect puts technical guidance, documentation, news and information in the pockets of LEEA members and their employees. With the latest news feeds from LEEA, safety alerts and access to the LEEA Library, LEEA Connect is a must-have tool for today’s lifting equipment professional.
Screenshots
Verdict
The clearest difference is review sentiment: NDT Reference at 50% against LEEA Connect's 0%. LEEA Connect's advantage is update cadence (every 4 months vs every 11 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NDT Reference ships an update every 11 months, LEEA Connect every 4 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.
| Parameter | NDT Reference | LEEA Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 7 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | The British Institute of Non-Destructive Testing | LEEA |
Customer experience
NDT Reference
LEEA Connect
In-app purchases
NDT Reference
No in-app purchases
LEEA Connect
No in-app purchases
