# Drilling Engineering vs Dr. DE

The clearest difference is rating: Dr. DE at 4.5 against Drilling Engineering's 3.8. Dr. DE also leads on update cadence (every 3 months vs every 42 months). Drilling Engineering's advantage is iOS requirement (7.0 vs 15.6). On price, review sentiment, ratings volume and ads there is nothing between them.

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 3.8. Both are backed by a comparable volume of ratings — 19 and 16 respectively. Written reviews point the same way: 50% of Drilling Engineering's written reviews are positive against 56% of Dr. DE's.

Drilling Engineering ships an update every 42 months, Dr. DE every 3 months. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Drilling Engineering | Dr. DE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (19 ratings)](https://appshunter.io/ios/app/drilling-engineering/id891302915/reviews) | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** |
| Number of ratings | **19** | 16 |
| Positive reviews | 50.0% of reviews | **55.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 8 MB | 33 MB |
| Requires iOS | **7.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [PT. Pertamina (Persero)](https://appshunter.io/developer/541838859) | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) |

## What reviewers say

### Drilling Engineering

[App page](https://appshunter.io/ios/app/drilling-engineering/id891302915)

This app provides essential tools for oil and gas professionals involved in drilling operations. It offers unit conversions, a comprehensive drilling calculator, API tubular data, stuck pipe problem identification, and well control calculations.

**Highlights:** Petroleum Unit Conversion, Drilling Calculator (90+ calculations), API Tubular Data, Stuck Pipe Problem Identification, Well Control Kill Sheet

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Drilling Engineering free?

Drilling Engineering is free to download, with no in-app purchases.

### Is Dr. DE free?

Dr. DE is free to download, with no in-app purchases.

### Which has better reviews, Drilling Engineering or Dr. DE?

Dr. DE is rated higher. Drilling Engineering averages 3.8 out of 5 from 19 ratings, while Dr. DE averages 4.5 from 16 ratings.

### Do Drilling Engineering or Dr. DE have ads?

Neither Drilling Engineering nor Dr. DE shows ads.

### Which is updated more often, Drilling Engineering or Dr. DE?

Drilling Engineering ships an update every 42 months, and Dr. DE every 3 months. Most recently, Drilling Engineering was updated on October 3, 2026 and Dr. DE on October 7, 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.*