# ECD Calculator vs Mud Man Pro

The clearest difference is in-app purchases: Mud Man Pro at none against ECD Calculator's 2. ECD Calculator's advantage is update cadence (every 5 days vs every 4 months) and ratings volume (5 vs 1). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. ECD Calculator sells 2 one-off in-app purchases. Mud Man Pro asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ECD Calculator against 5.0 for Mud Man Pro. That said, the two scores are not equally well evidenced: ECD Calculator has 5 ratings behind it against 1, so its average is the more settled of the two.

ECD Calculator ships an update every 5 days, Mud Man Pro every 4 months. The most recent releases landed on August 19, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | ECD Calculator | Mud Man Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/ecd-calculator/id6754762850/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/mud-man-pro/id6765783852/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Free | Free |
| Size | 45 MB | 3 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Drillsoft LLC](https://appshunter.io/developer/1787962403) | [Colten Meadows](https://appshunter.io/developer/1896073318) |

## What reviewers say

### ECD Calculator

[App page](https://appshunter.io/ios/app/ecd-calculator/id6754762850)

This utility app assists drilling and mud engineers in calculating Equivalent Circulating Density (ECD) at any point during operations. It offers a streamlined process with just a few clicks.

**Highlights:** ECD calculation, Drilling engineering, Mud engineering, Point-of-operation calculation, Streamlined interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 credits | $3.99 | one-time |
| 300 Credits | $9.99 | one-time |


### 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 ECD Calculator free?

ECD Calculator is free to download, with in-app purchases available.

### Is Mud Man Pro free?

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

### Which has better reviews, ECD Calculator or Mud Man Pro?

ECD Calculator and Mud Man Pro are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do ECD Calculator or Mud Man Pro have ads?

Neither ECD Calculator nor Mud Man Pro shows ads.

### Which is updated more often, ECD Calculator or Mud Man Pro?

ECD Calculator ships an update every 5 days, and Mud Man Pro every 4 months. Most recently, ECD Calculator was updated on August 19, 2026 and Mud Man Pro on August 26, 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.*