# Dr. DE vs Mud Weight

The clearest difference is price: Dr. DE at Free against Mud Weight's $0.99. Dr. DE also leads on rating (4.5 vs 3.0) and ratings volume (16 vs 2). Mud Weight's advantage is iOS requirement (10.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

Dr. DE is free to download; Mud Weight costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dr. DE holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Dr. DE has 16 ratings behind it against 2, so its average is the more settled of the two.

Dr. DE ships an update every 3 months, Mud Weight every 4 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Dr. DE | Mud Weight |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/mud-weight/id1456298201/reviews) |
| Number of ratings | **16** | 2 |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 33 MB | 86 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [GoodStamp](https://appshunter.io/developer/717537129) |

## 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 Weight

[App page](https://appshunter.io/ios/app/mud-weight/id1456298201)

This utility app assists oil and gas professionals with quick calculations for drilling fluid weight. It allows users to adjust parameters like specific gravity and sack weight, save preferences for different wells, and calculate material needs.

**Highlights:** Adjust specific gravity, Calculate sack weight, Manage pallet sizes, Save mud and material preferences, Create multiple wells, Calculate material amounts

**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 Weight free?

Mud Weight costs $0.99, with no in-app purchases.

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

Dr. DE is rated higher. Dr. DE averages 4.5 out of 5 from 16 ratings, while Mud Weight averages 3.0 from 2 ratings.

### Do Dr. DE or Mud Weight have ads?

Neither Dr. DE nor Mud Weight shows ads.

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

Dr. DE ships an update every 3 months, and Mud Weight every 4 months. Most recently, Dr. DE was updated on October 7, 2026 and Mud Weight on October 9, 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.*