# Driller's Method vs DUPT Motor Catalog

The clearest difference is price: DUPT Motor Catalog at Free against Driller's Method's $19.99. DUPT Motor Catalog also leads on update cadence (every 2 months vs every 16 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

DUPT Motor Catalog 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.

Driller's Method ships an update every 16 months, DUPT Motor Catalog every 2 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Driller's Method | DUPT Motor Catalog |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 19 MB | 34 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [德州联合石油科技股份有限公司](https://appshunter.io/developer/1694252731) |

## What reviewers say

### 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


### DUPT Motor Catalog

[App page](https://appshunter.io/ios/app/dupt-motor-catalog/id6450656458)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Driller's Method free?

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

### Is DUPT Motor Catalog free?

DUPT Motor Catalog is free to download, with no in-app purchases.

### Do Driller's Method or DUPT Motor Catalog have ads?

Neither Driller's Method nor DUPT Motor Catalog shows ads.

### Which is updated more often, Driller's Method or DUPT Motor Catalog?

Driller's Method ships an update every 16 months, and DUPT Motor Catalog every 2 months. Most recently, Driller's Method was updated on October 2, 2026 and DUPT Motor Catalog on October 6, 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.*