Dr. DE vs Riser Safety Margin
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
Riser Safety Margin
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This app is a tool for application on deepwater drilling operations (Oil & Gas). About Riser Safety Margin: The slight increase in mud weight needed to offset the loss in hydrostatic pressure when the riser is disconnected from the bop and the hydrostatic pressure of the mud to the mud line is replaced by the hydrostatic of the column of sea water. Emergency disconnection can occur in blackout condition, failure of the dynamic positioning system, etc. DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk. Thanks
Screenshots
Verdict
The clearest difference is update cadence: Dr. DE at every 3 months against Riser Safety Margin's every 37 months. Riser Safety Margin's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Dr. DE ships an update every 3 months, Riser Safety Margin every 37 months. The most recent releases landed on July 18, 2026 and September 15, 2026 respectively.
| Parameter | Dr. DE | Riser Safety Margin |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (16 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Every 3 months — better | Every 37 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 33 MB | 8 MB |
| Age rating | 17+ | 4+ |
| Developer | Pegasus Vertex, Inc. | Carlos Moura |
In-app purchases
Dr. DE
No in-app purchases
Riser Safety Margin
No in-app purchases
Questions
Is Dr. DE free?
Is Riser Safety Margin free?
Do Dr. DE or Riser Safety Margin have ads?
Which is updated more often, Dr. DE or Riser Safety Margin?
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