# Drilling Engineering vs Workover Assistant

The clearest difference is rating: Workover Assistant at 5.0 against Drilling Engineering's 3.8. Drilling Engineering's advantage is ratings volume (19 vs 2) and iOS requirement (7.0 vs 16.6). 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.

Workover Assistant holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Drilling Engineering has 19 ratings behind it against 2, so its average is the more settled of the two.

Drilling Engineering ships an update every 42 months, Workover Assistant every 58 months. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Drilling Engineering | Workover Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (19 ratings)](https://appshunter.io/ios/app/drilling-engineering/id891302915/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/workover-assistant/id1117692519/reviews)** |
| Number of ratings | **19** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 42 months** | Every 58 months |
| Monetization | Free | Free |
| Size | 8 MB | 3 MB |
| Requires iOS | **7.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PT. Pertamina (Persero)](https://appshunter.io/developer/541838859) | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) |

## 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


### Workover Assistant

[App page](https://appshunter.io/ios/app/workover-assistant/id1117692519)

This utility app assists oil and gas field personnel with essential calculations for well workovers. It provides tools for hydrostatic pressure, internal capacity, and other critical functions, serving as a convenient resource for rig site or office use.

**Highlights:** Hydrostatic pressure calculations, Internal capacity calculations, Oil and gas well workover tools, Rig site and office utility, Accurate field calculations

**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 Workover Assistant free?

Workover Assistant is free to download, with no in-app purchases.

### Which has better reviews, Drilling Engineering or Workover Assistant?

Workover Assistant is rated higher. Drilling Engineering averages 3.8 out of 5 from 19 ratings, while Workover Assistant averages 5.0 from 2 ratings.

### Do Drilling Engineering or Workover Assistant have ads?

Neither Drilling Engineering nor Workover Assistant shows ads.

### Which is updated more often, Drilling Engineering or Workover Assistant?

Drilling Engineering ships an update every 42 months, and Workover Assistant every 58 months. Most recently, Drilling Engineering was updated on October 3, 2026 and Workover Assistant on October 4, 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.*