# Piping DataBase vs NDT Master

The clearest difference is review sentiment: Piping DataBase at 100% against NDT Master's 0%. Piping DataBase also leads on rating (5.0 vs 3.0) and in-app purchases (none vs 1). NDT Master's advantage is price (Free vs $3.99) and update cadence (every 2 weeks vs every 4 months). On ratings volume, ads and device support there is nothing between them.

NDT Master is free to download; Piping DataBase costs $3.99 up front. NDT Master sells 1 one-off in-app purchase. Piping DataBase asks for nothing beyond the download.

Piping DataBase holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 100% of Piping DataBase's written reviews are positive against 0% of NDT Master's.

Piping DataBase ships an update every 4 months, NDT Master every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Piping DataBase | NDT Master |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/piping-database-schedule/id355465488/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/ndt-master-ut-weld-calculator/id6762549446/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 20 MB |
| Requires iOS | **8.0** | 15 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Radin Alcira](https://appshunter.io/developer/352538434) | [雪 蔺](https://appshunter.io/developer/1853712836) |

## What reviewers say

### Piping DataBase

[App page](https://appshunter.io/ios/app/piping-database-schedule/id355465488)

This mobile reference tool provides essential data for piping engineers and professionals in various industries. It offers standard dimensions for steel and stainless steel pipes, supporting both US Customary and SI units.

**Highlights:** Standard pipe dimensions (OD, wall thickness, mass), Welded and seamless steel pipes, Wrought stainless steel pipes, Supports pipe sizes up to 80", Interchangeable US Customary and SI Units, Includes all Schedule and Identifications

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NDT Master

[App page](https://appshunter.io/ios/app/ndt-master-ut-weld-calculator/id6762549446)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

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


## Frequently asked questions

### Is Piping DataBase free?

Piping DataBase costs $3.99, with no in-app purchases.

### Is NDT Master free?

NDT Master is free to download, with in-app purchases available.

### Which has better reviews, Piping DataBase or NDT Master?

Piping DataBase is rated higher. Piping DataBase averages 5.0 out of 5 from 2 ratings, while NDT Master averages 3.0 from 2 ratings.

### Do Piping DataBase or NDT Master have ads?

Neither Piping DataBase nor NDT Master shows ads.

### Which is updated more often, Piping DataBase or NDT Master?

Piping DataBase ships an update every 4 months, and NDT Master every 2 weeks. Most recently, Piping DataBase was updated on October 27, 2026 and NDT Master on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*