# Volumetric Method vs Drillstring Toolbox Premium

The clearest difference is price: Volumetric Method at $19.99 against Drillstring Toolbox Premium's $24.99. Volumetric Method also leads on iOS requirement (11.0 vs 14.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Volumetric Method costs $19.99 and Drillstring Toolbox Premium $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Volumetric Method ships an update every 38 months, Drillstring Toolbox Premium every 24 months. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Volumetric Method | Drillstring Toolbox Premium |
| --- | --- | --- |
| Price | **$19.99** | $24.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 24 months** |
| Size | 16 MB | 1 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) |

## What reviewers say

### Volumetric Method

[App page](https://appshunter.io/ios/app/volumetric-method/id1067133508)

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

**In-app purchases:** none


### Drillstring Toolbox Premium

[App page](https://appshunter.io/ios/app/drillstring-toolbox-premium/id1222651738)

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

**In-app purchases:** none


## Frequently asked questions

### Is Volumetric Method free?

Volumetric Method costs $19.99, with no in-app purchases.

### Is Drillstring Toolbox Premium free?

Drillstring Toolbox Premium costs $24.99, with no in-app purchases.

### Do Volumetric Method or Drillstring Toolbox Premium have ads?

Neither Volumetric Method nor Drillstring Toolbox Premium shows ads.

### Which is updated more often, Volumetric Method or Drillstring Toolbox Premium?

Volumetric Method ships an update every 38 months, and Drillstring Toolbox Premium every 24 months. Most recently, Volumetric Method was updated on September 10, 2026 and Drillstring Toolbox Premium on September 20, 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.*