# Dr. DE vs Mud Man Pro

The clearest difference is rating: Mud Man Pro at 5.0 against Dr. DE's 4.5. Dr. DE's advantage is ratings volume (16 vs 1) and device support (3 vs 1). On price, update cadence, 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.

Mud Man Pro holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Dr. DE has 16 ratings behind it against 1, so its average is the more settled of the two.

Dr. DE ships an update every 3 months, Mud Man Pro every 4 months. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Dr. DE | Mud Man Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mud-man-pro/id6765783852/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 33 MB | 3 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Colten Meadows](https://appshunter.io/developer/1896073318) |

## 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


### Mud Man Pro

[App page](https://appshunter.io/ios/app/mud-man-pro/id6765783852)

This offline drilling fluid calculator provides essential tools for mud engineers on the rig. It offers over 20 specialized calculators for various fluid properties and operations, along with a comprehensive field notes library. Designed for speed and accuracy without internet dependency.

**Highlights:** 20+ drilling fluid calculators, OBM and WBM support, Offline functionality, Field notes library, Pilot test converter, Hitch calendar

**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 Mud Man Pro free?

Mud Man Pro is free to download, with no in-app purchases.

### Which has better reviews, Dr. DE or Mud Man Pro?

Mud Man Pro is rated higher. Dr. DE averages 4.5 out of 5 from 16 ratings, while Mud Man Pro averages 5.0 from 1 ratings.

### Do Dr. DE or Mud Man Pro have ads?

Neither Dr. DE nor Mud Man Pro shows ads.

### Which is updated more often, Dr. DE or Mud Man Pro?

Dr. DE ships an update every 3 months, and Mud Man Pro every 4 months. Most recently, Dr. DE was updated on October 7, 2026 and Mud Man Pro on October 11, 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.*