# Dr. DE vs Drilling Hydraulics 2

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.

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.

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

## The numbers

| Metric | Dr. DE | Drilling Hydraulics 2 |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[4.5 (15 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | **55.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#198** |
| Size | 33 MB | 28 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [Carlos Moura](https://appshunter.io/developer/407501202) |

## What reviewers say

### Dr. DE

[App page](https://appshunter.io/ios/app/dr-de/id954796004)

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:** macOS Compatibility

**In-app purchases:** none


### Drilling Hydraulics 2

[App page](https://appshunter.io/ios/app/drilling-hydraulics-2/id1322464939)

**Currently charting:** #198 Top Paid · Utilities (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*