# Dr. DE vs Driller's Method

The clearest difference is review sentiment: Dr. DE at 56% against Driller's Method's 0%. Dr. DE also leads on price (Free vs $19.99) and update cadence (every 3 months vs every 16 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Dr. DE is free to download; Driller's Method 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, Driller's Method every 16 months. The most recent releases landed on July 18, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | Dr. DE | Driller's Method |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | **55.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 16 months |
| Monetization | **Free** | Paid |
| Size | 33 MB | 19 MB |
| Requires iOS | 15.6 | 15.6 |
| 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


### Driller's Method

[App page](https://appshunter.io/ios/app/drillers-method/id1067011800)

This application assists with oil well control calculations using the Driller's Method, particularly for kick occurrences on floating and landing rigs. It's a tool for oilfield professionals and students to understand and apply these essential calculations.

**Highlights:** Driller's Method calculations, Kick occurrence management, Floating platform support, Landing rig application, Kill sheet data import, Educational tool

**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 Driller's Method free?

Driller's Method costs $19.99, with no in-app purchases.

### Do Dr. DE or Driller's Method have ads?

Neither Dr. DE nor Driller's Method shows ads.

### Which is updated more often, Dr. DE or Driller's Method?

Dr. DE ships an update every 3 months, and Driller's Method every 16 months. Most recently, Dr. DE was updated on July 18, 2026 and Driller's Method on September 2, 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.*