MUDSheet vs ECD Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MUDSheet
This app provides essential calculations and data for mud engineering. It distills critical information from various engineering resources into a convenient tool for mud and drilling engineers, offering quick access to equations and chemical formulas.
- Essential mud engineering calculations
- Quick access to drilling equations
- Chemical formulas and atomic table
- Unit conversion and setup exchange
- Input data validation
- Multiple table references
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MUDSheet covers the most essential calculation and data in mud engineering. Designed for mud engineers and drilling engineers, MUDSheet is an app that contains 23 most commonly used calculations, ranging from pipe capacity, pump output to mud additives. We, engineers, are often overwhelmed by the information scattered around in various media forms. Now, the most essential information from engineering handbooks, SPE textbooks, IADC manuals, has been distilled into MUDSheet, a must-have application for every mud engineer and technician to get the job done accurately and efficiently. Features: • Engineering calculation in a second • Quick access to drilling equations and chemical formulas • Being convenient for unit setup exchange • Replaces paper charts and tables • Input data validation • Samples for demonstration • Optional function display and flexible order change • Multiple table references on mud capacity, volume, and properties Functions: • Pipe Capacity • Annular Capacity • Pipe & Annular Volume • Pump-Duplex • Pump-Triplex • Pump-Quadruple • Rectangular Tank Volume • Mesh • Nozzle Total Flow Area • Annular Velocity • CaCl2 • NaCl • Brine Density • Brine Viscosity • Specific Gravity • PV/YP in Water-Based Mud • Solids in Water-Based Mud • Mud Weight Adjustment • Temperature • Chemical Formula • Atomic Table • Unit Conversion
ECD Calculator
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.
- ECD calculation
- Drilling engineering
- Mud engineering
- Point-of-operation calculation
- Streamlined interface
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ECD calculator help drilling and mud engineers calculate the ECD at any point with a few click
Screenshots
Verdict
The clearest difference is in-app purchases: MUDSheet at none against ECD Calculator's 2. MUDSheet also leads on iOS requirement (9.0 vs 15.1). ECD Calculator's advantage is update cadence (every 5 days vs every 2 months) and ratings volume (5 vs 1). On price, rating, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ECD Calculator sells 2 one-off in-app purchases. MUDSheet asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for MUDSheet against 5.0 for ECD Calculator. 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.
MUDSheet ships an update every 2 months, ECD Calculator every 5 days. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.
| Parameter | MUDSheet | ECD Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (5 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 18 MB | 45 MB |
| Age rating | 17+ | 17+ |
| Developer | Pegasus Vertex, Inc. | Drillsoft LLC |
Customer experience
MUDSheet
ECD Calculator
In-app purchases
MUDSheet
No in-app purchases
ECD Calculator
- 50 credits$3.99
- 300 Credits$9.99








