NDT Worldwide vs Liquid Penetrant Study Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NDT Worldwide
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We offers targeted training designed to your professional certification's needs. We offer training with On-site Instructor-led courses, Virtual Classroom, eLearning, Online Courses and blended learning options. NDT Training - Worldwide’s faculty of lead trainers and mentor coaches have a cumulative over 10 to 15 years of training and filed experience. These Preparatory courses have been conducted Worldwide.
Liquid Penetrant Study Guide
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Pass your Liquid Penetrant Testing (PT) certification exam with a study guide built by an ASNT NDT Level III with 30+ years in aerospace and industrial NDT. 550+ practice questions cover Level 1, Level 2 and Level 3, organized into 7 topics so you can drill exactly where you're weak: - Equipment - Surface Preparation - Penetrants - Washing and Cleaning - Developers - Inspections - Techniques STUDY MODE: Answer at your own pace and get the explanation as soon as you answer correctly. TEST MODE: Simulate exam conditions with 10 to 150 questions, then see your score and a breakdown by topic. REVIEW MISSED QUESTIONS: Tap any question you got wrong to see your answer, the correct answer, and why it's right. Plus PT training videos, the AMS Level 3 Training Academy with NAS 410 PT courses, and a free 5-year NDT career planner. Built for PT trainees, technicians moving up to Level 2, and candidates preparing for Level 3, NAS 410 or SNT-TC-1A employer exams.
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Verdict
The clearest difference is price: NDT Worldwide at Free against Liquid Penetrant Study Guide's $14.99. NDT Worldwide also leads on iOS requirement (15.6 vs 18.5). Liquid Penetrant Study Guide's advantage is in-app purchases (none vs 10) and update cadence (every 3 months vs every 16 months). On 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
NDT Worldwide is free to download; Liquid Penetrant Study Guide costs $14.99 up front. NDT Worldwide sells 10 one-off in-app purchases. Liquid Penetrant Study Guide asks for nothing beyond the download.
NDT Worldwide ships an update every 16 months, Liquid Penetrant Study Guide every 3 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | NDT Worldwide | Liquid Penetrant Study Guide |
|---|---|---|
| Price | Free — better | $14.99 |
| Update frequency | Every 16 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.5 |
| Further details — not scored | ||
| Size | 265 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | WWNDT SERVICES PRIVATE LIMITED | Skaggs Media LLC |
In-app purchases
NDT Worldwide
- ASTM E165$44.99
- ASTM E2582$44.99
- ASTM E2375$54.99
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- ASTM E709$54.99
- ASTM E2375$69.99
- ASNT MT Level III Examination$219.99
- ASNT NDT Level III-BASIC$299.99
- ASNT UT Level III Examination$299.99
- ASNT ML Level III Examination$399.99
- ASNT NDT Level III BASIC$449.99
Liquid Penetrant Study Guide
No in-app purchases
Questions
Is NDT Worldwide free?
Is Liquid Penetrant Study Guide free?
Do NDT Worldwide or Liquid Penetrant Study Guide have ads?
Which is updated more often, NDT Worldwide or Liquid Penetrant Study Guide?
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