Comparison

Dr. DE vs Drilling Hydraulics 2

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 29 drilling engineering functions
  • 11 functional groups
  • Bit hydraulics calculations
  • Hole cleaning analysis
  • Well control solutions
  • Unit conversion tools
  • Tank capacity calculations
Features
Read full description

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

About

Drilling Hydraulics 2

This tool assists oil and gas professionals with critical drilling hydraulics calculations. It helps optimize penetration rates and select appropriate bit nozzles for various well types, including onshore, offshore, vertical, and directional wells.

Highlights
  • Well planning for onshore/offshore, vertical/directional wells
  • Drill string and bit nozzle calculations
  • Volume, capacity, and hydrostatic calculations
  • Surface equipment mud pump and connection data
  • Directional well calculations (Type I and Horizontal)
  • Imports data from other simulator apps
Features
Currently charting
Read full description

The Drilling Hydraulics provides to driller, tool pushers, engineers, chemists, students and other professionals in the petroleum industry a productivity tool helpful in drilling of oil wells for hydraulics calculations, optimization of the penetration rate and can help on the decision on selection of bit nozzles. Well Features: - Well Planning: Onshore or Offshore (riser, casing, liner and open hole). Vertical or Directional Type I and Horizontal. - Drill string: 2 drill pipes, heavy weight, 2 drill collars, drilling motor and drill bit (w/ until 12 nozzles). - Volume, capacity, strokes, hydrostatic and drilling hydraulics calculations; Surface Equipment: - 04 mud pumps - Surface connections: standpipe, mud hose, swivel, top drive, kelly, stands - Choke diameter - Elevation system weight; Directional Well: - This app works with Directional Well Type I and Horizontal, only. - For other features in directional wells, we recommend the "Directional Drilling Hydraulics" application available in our portfolio in the App Store. Importing Data Files: This app imports data files from other apps available in our portfolio on the App Store: "Drilling Simulator 1, 2 and 3", "Well Control Simulator", "MPD Simulator", "Kick Tolerance", "Leak-Off Test Simulator", "Kick Game" and "Well Control Methods" 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.

Screenshots

Dr. DE4 screens
Drilling Hydraulics 24 screens

Verdict

The call

The clearest difference is review sentiment: Dr. DE at 56% against Drilling Hydraulics 2's 0%. Dr. DE also leads on price (Free vs $19.99) and update cadence (every 3 months vs every 22 months). Drilling Hydraulics 2's advantage is chart position (#198 vs unranked) and iOS requirement (12.0 vs 15.6). On 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

CostPrice · In-app purchases · Ads · Monetization

Dr. DE is free to download; Drilling Hydraulics 2 costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Dr. DE ships an update every 3 months, Drilling Hydraulics 2 every 22 months. Both last shipped on October 24, 2026.

Scorecard6 real differences · 5 level
Dr. DE versus Drilling Hydraulics 2: the parameters behind the verdict, then further details
ParameterDr. DEDrilling Hydraulics 2
PriceFree — better$19.99
Rating4.5 (15 ratings) — better—
Positive reviews55.6% of reviews — better0.0% of reviews
Number of ratings15 — better—
Update frequencyEvery 3 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#198 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size33 MB28 MB
Age rating17+4+
DeveloperPegasus Vertex, Inc.Carlos Moura

Customer experience

Dr. DE

All ratings16 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews9 reviews
Positive55.6%
Neutral0.0%
Negative44.4%

Drilling Hydraulics 2

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Dr. DE

No in-app purchases

None

Drilling Hydraulics 2

No in-app purchases

Questions

Is Dr. DE free?
Dr. DE is free to download, with no in-app purchases.
Is Drilling Hydraulics 2 free?
Drilling Hydraulics 2 costs $19.99, with no in-app purchases.
Do Dr. DE or Drilling Hydraulics 2 have ads?
Neither Dr. DE nor Drilling Hydraulics 2 shows ads.
Which is updated more often, Dr. DE or Drilling Hydraulics 2?
Dr. DE ships an update every 3 months, and Drilling Hydraulics 2 every 22 months. Most recently, Dr. DE was updated on October 24, 2026 and Drilling Hydraulics 2 on October 24, 2026.

Other comparisons