# Dr. DE vs TracPipe System Guide

The clearest difference is rating: Dr. DE at 4.5 against TracPipe System Guide's 3.8. Dr. DE also leads on review sentiment (56% vs 33%) and update cadence (every 3 months vs every 9 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dr. DE holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 16 and 9 respectively. Written reviews point the same way: 56% of Dr. DE's written reviews are positive against 33% of TracPipe System Guide's.

Dr. DE ships an update every 3 months, TracPipe System Guide every 9 months. The most recent releases landed on July 18, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Dr. DE | TracPipe System Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | [3.8 (9 ratings)](https://appshunter.io/ios/app/tracpipe-system-guide/id996885333/reviews) |
| Number of ratings | **16** | 9 |
| Positive reviews | **55.6% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | **Free** | Ad-supported |
| Size | 33 MB | 33 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Omega Flex, Inc.](https://appshunter.io/developer/996885332) |

## What reviewers say

### Dr. DE

[App page](https://appshunter.io/ios/app/dr-de/id954796004)

This mobile toolbox simplifies complex drilling engineering calculations. It offers a comprehensive suite of 29 functions across 11 categories, eliminating the need for handbooks and improving efficiency for engineers and technicians.

**Highlights:** 29 drilling engineering functions, 11 functional groups, Bit hydraulics calculations, Hole cleaning analysis, Well control solutions, Unit conversion tools, Tank capacity calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### TracPipe System Guide

[App page](https://appshunter.io/ios/app/tracpipe-system-guide/id996885333)

This application helps users calculate the correct size of flexible gas piping for installations. It supports various sizing methods and gas types, providing accurate results based on selected parameters. Users can also access updated design guides and installation instructions.

**Highlights:** Flexible gas piping sizing calculator, Supports Longest Run or Branch length methods, Calculates capacity based on gas type, pressure, and pressure drop, Easy-to-use calculator wheel, Access to updated Design Guide and Installation Instructions, Find a Sales Representative feature

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr. DE free?

Dr. DE is free to download, with no in-app purchases.

### Is TracPipe System Guide free?

TracPipe System Guide is free to download, with no in-app purchases.

### Which has better reviews, Dr. DE or TracPipe System Guide?

Dr. DE is rated higher. Dr. DE averages 4.5 out of 5 from 16 ratings, while TracPipe System Guide averages 3.8 from 9 ratings.

### Do Dr. DE or TracPipe System Guide have ads?

Neither Dr. DE nor TracPipe System Guide shows ads.

### Which is updated more often, Dr. DE or TracPipe System Guide?

Dr. DE ships an update every 3 months, and TracPipe System Guide every 9 months. Most recently, Dr. DE was updated on July 18, 2026 and TracPipe System Guide on September 14, 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.*