# Pipe Source vs Ultimate NDT Pocketbook

The clearest difference is rating: Ultimate NDT Pocketbook at 5.0 against Pipe Source's 4.0. Ultimate NDT Pocketbook also leads on update cadence (weekly vs every 4 months) and ratings volume (6 vs 1). Pipe Source's advantage is in-app purchases (none vs 2) and iOS requirement (7.1 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Ultimate NDT Pocketbook sells 2 in-app purchases, starting at $5.99 per month. Pipe Source asks for nothing beyond the download.

Ultimate NDT Pocketbook holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ultimate NDT Pocketbook has 6 ratings behind it against 1, so its average is the more settled of the two.

Pipe Source ships an update every 4 months, Ultimate NDT Pocketbook weekly. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Pipe Source | Ultimate NDT Pocketbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/pipe-source/id570134803/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/ultimate-ndt-pocketbook/id6759848851/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Size | 12 MB | 52 MB |
| Requires iOS | **7.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Pipe Co. LLC](https://appshunter.io/developer/570134806) | [james rose](https://appshunter.io/developer/1881188690) |

## What reviewers say

### Pipe Source

[App page](https://appshunter.io/ios/app/pipe-source/id570134803)

Access comprehensive steel pipe specifications and industry conversion calculators. Easily find pipe charts for various sizes and schedules, and quickly convert units like feet to tons and $/ft to $/ton. Connect with industry experts for immediate assistance.

**Highlights:** Imperial and metric pipe charts, Wall thickness and weight per foot data, Oil Country and Tubular product information, Industry conversion calculators, Contact industry experts, Branch locator

**Features:** macOS Compatibility

**In-app purchases:** none


### Ultimate NDT Pocketbook

[App page](https://appshunter.io/ios/app/ultimate-ndt-pocketbook/id6759848851)

This app provides nondestructive testing (NDT) technicians with a comprehensive toolkit for field inspections. It offers essential calculations, references, and guidance across various NDT methods, with core features accessible offline. A subscription is required for full access.

**Highlights:** Field calculators for exposure, barricade distance, and more, Inspection references for RT, UT, ET, and VT, Technician tools for quick calculations and code helpers, Offline functionality for core features, Multiple language support, Support for various NDT methods

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NDT Pocketbook Premium (Monthly) | $5.99 | per month |
| NDT Pocketbook Premium (Yearly) | $49.99 | per year |


## Frequently asked questions

### Is Pipe Source free?

Pipe Source is free to download, with no in-app purchases.

### Is Ultimate NDT Pocketbook free?

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

### Which has better reviews, Pipe Source or Ultimate NDT Pocketbook?

Ultimate NDT Pocketbook is rated higher. Pipe Source averages 4.0 out of 5 from 1 ratings, while Ultimate NDT Pocketbook averages 5.0 from 6 ratings.

### Do Pipe Source or Ultimate NDT Pocketbook have ads?

Neither Pipe Source nor Ultimate NDT Pocketbook shows ads.

### Which is updated more often, Pipe Source or Ultimate NDT Pocketbook?

Pipe Source ships an update every 4 months, and Ultimate NDT Pocketbook weekly. Most recently, Pipe Source was updated on October 2, 2026 and Ultimate NDT Pocketbook on October 7, 2026.

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