Dr. DE vs ECD Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dr. DE
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.
- 29 drilling engineering functions
- 11 functional groups
- Bit hydraulics calculations
- Hole cleaning analysis
- Well control solutions
- Unit conversion tools
- Tank capacity calculations
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Do you want to solve drilling engineering problems in seconds? It is easier than ever before to use Dr. DE Lite mobile app, a must-have toolbox app that includes a substantial collection of functions for every drilling engineer and technician. Bid farewell to flipping through handbooks, textbooks, standards, etc. for answers. This free app, sophisticated yet simple to use, not only saves time and money, but also makes your engineering and sales efforts more reliable and professional. The Dr. DE Lite app is equipped with 29 functions that are divided into 11 groups. --Bit Hydraulics --Casing Centralizer --Hole Cleaning --Hydraulics --Mud Additives --Pipe --Pump --Tank Capacity --Volume and Capacity --Well Control --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 review sentiment: ECD Calculator at 100% against Dr. DE's 56%. ECD Calculator also leads on rating (5.0 vs 4.5) and update cadence (every 5 days vs every 3 months). Dr. DE's advantage is in-app purchases (none vs 2) and ratings volume (15 vs 5). On price, ads, monetization model and device support 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. Dr. DE asks for nothing beyond the download.
ECD Calculator holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews point the same way: 56% of Dr. DE's written reviews are positive against 100% of ECD Calculator's.
Dr. DE ships an update every 3 months, ECD Calculator every 5 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.
| Parameter | Dr. DE | ECD Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (15 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 55.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | 5 |
| Update frequency | Every 3 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 | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 33 MB | 45 MB |
| Age rating | 17+ | 17+ |
| Developer | Pegasus Vertex, Inc. | Drillsoft LLC |
Customer experience
Dr. DE
ECD Calculator
In-app purchases
Dr. DE
No in-app purchases
ECD Calculator
- 50 credits$3.99
- 300 Credits$9.99
