# Driller's Method vs WellCalc

The clearest difference is price: WellCalc at Free against Driller's Method's $19.99. WellCalc also leads on update cadence (weekly vs every 16 months). Driller's Method's advantage is in-app purchases (none vs 2) and iOS requirement (15.6 vs 18.0). On ads and device support there is nothing between them.

WellCalc is free to download; Driller's Method costs $19.99 up front. WellCalc sells 2 in-app purchases, starting at $4.99 per month. Driller's Method asks for nothing beyond the download.

Driller's Method ships an update every 16 months, WellCalc weekly. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Driller's Method | WellCalc |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Weekly** |
| Monetization | Paid | — |
| Size | 19 MB | 13 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Ryan Tinklepaugh](https://appshunter.io/developer/1883444651) |

## 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


### WellCalc

[App page](https://appshunter.io/ios/app/wellcalc/id6761081416)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WellCalc Pro Monthly | $4.99 | per month |
| WellCalc Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Driller's Method free?

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

### Is WellCalc free?

WellCalc is free to download, with in-app purchases available.

### Do Driller's Method or WellCalc have ads?

Neither Driller's Method nor WellCalc shows ads.

### Which is updated more often, Driller's Method or WellCalc?

Driller's Method ships an update every 16 months, and WellCalc weekly. Most recently, Driller's Method was updated on October 2, 2026 and WellCalc on October 18, 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.*