# Drilling Engineering vs Drillstring Toolbox

The clearest difference is review sentiment: Drillstring Toolbox at 100% against Drilling Engineering's 50%. Drilling Engineering's advantage is rating (3.8 vs 3.3) and ratings volume (19 vs 3). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Drilling Engineering holds the better App Store score, 3.8 against 3.3. That said, the two scores are not equally well evidenced: Drilling Engineering has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 50% of Drilling Engineering's written reviews are positive against 100% of Drillstring Toolbox's, so the app with the better star average is not the one people write more warmly about.

Drilling Engineering ships an update every 42 months, Drillstring Toolbox every 39 months. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Drilling Engineering | Drillstring Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (19 ratings)](https://appshunter.io/ios/app/drilling-engineering/id891302915/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189/reviews) |
| Number of ratings | **19** | 3 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 39 months** |
| Monetization | Free | Free |
| Size | 8 MB | 1 MB |
| Requires iOS | **7.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PT. Pertamina (Persero)](https://appshunter.io/developer/541838859) | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) |

## 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


### Drillstring Toolbox

[App page](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189)

This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.

**Highlights:** Drill-stem load capacity calculation, API connection selection, Makeup torque calculation, Tensile capacity calculation, Drill pipe tube capacities

**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 Drillstring Toolbox free?

Drillstring Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Drilling Engineering or Drillstring Toolbox?

Drilling Engineering is rated higher. Drilling Engineering averages 3.8 out of 5 from 19 ratings, while Drillstring Toolbox averages 3.3 from 3 ratings.

### Do Drilling Engineering or Drillstring Toolbox have ads?

Neither Drilling Engineering nor Drillstring Toolbox shows ads.

### Which is updated more often, Drilling Engineering or Drillstring Toolbox?

Drilling Engineering ships an update every 42 months, and Drillstring Toolbox every 39 months. Most recently, Drilling Engineering was updated on October 3, 2026 and Drillstring Toolbox 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.*