Dr. DE vs Drillstring Toolbox
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
Drillstring Toolbox
This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.
- Drill-stem load capacity calculation
- API connection selection
- Makeup torque calculation
- Tensile capacity calculation
- Drill pipe tube capacities
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Drillstring Toolbox is a free calculator from Standard DS-1 that gives you the drill-stem load capacities you need! You can choose an API connection (along with the size you're interested in) to find its recommended makeup torque and tensile capacity. Tap the "Tube" tab to find the tensile and torsion capacities for drill pipe tubes as well!
Screenshots
Verdict
The clearest difference is review sentiment: Drillstring Toolbox at 100% against Dr. DE's 56%. Dr. DE's advantage is rating (4.5 vs 3.3) and update cadence (every 3 months vs every 39 months). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Dr. DE holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Dr. DE has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 56% of Dr. DE's written reviews are positive against 100% of Drillstring Toolbox's, so the app with the better star average is not the one people write more warmly about.
Dr. DE ships an update every 3 months, Drillstring Toolbox every 39 months. The most recent releases landed on July 18, 2026 and September 5, 2026 respectively.
| Parameter | Dr. DE | Drillstring Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (16 ratings) — better | 3.3 (3 ratings) |
| Positive reviews | 55.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 16 — better | 3 |
| Update frequency | Every 3 months — better | Every 39 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 33 MB | 1 MB |
| Age rating | 17+ | 4+ |
| Developer | Pegasus Vertex, Inc. | Bureau Veritas North America, Inc. |
Customer experience
Dr. DE
Drillstring Toolbox
In-app purchases
Dr. DE
No in-app purchases
Drillstring Toolbox
No in-app purchases
Questions
Is Dr. DE free?
Is Drillstring Toolbox free?
Which has better reviews, Dr. DE or Drillstring Toolbox?
Do Dr. DE or Drillstring Toolbox have ads?
Which is updated more often, Dr. DE or Drillstring Toolbox?
Other comparisons
