# Drilling Engineering vs Directional Survey Methods

The clearest difference is iOS requirement: Drilling Engineering at 7.0 against Directional Survey Methods's 12.0. 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 ships an update every 42 months, Directional Survey Methods every 50 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Drilling Engineering | Directional Survey Methods |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (19 ratings)](https://appshunter.io/ios/app/drilling-engineering/id891302915/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 42 months** | Every 50 months |
| Monetization | Free | — |
| Size | 8 MB | 7 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PT. Pertamina (Persero)](https://appshunter.io/developer/541838859) | [Carlos Moura](https://appshunter.io/developer/407501202) |

## 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


### Directional Survey Methods

[App page](https://appshunter.io/ios/app/directional-survey-methods/id1130800392)

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

**In-app purchases:** none


## Frequently asked questions

### Is Drilling Engineering free?

Drilling Engineering is free to download, with no in-app purchases.

### Is Directional Survey Methods free?

Directional Survey Methods is free to download, with no in-app purchases.

### Do Drilling Engineering or Directional Survey Methods have ads?

Neither Drilling Engineering nor Directional Survey Methods shows ads.

### Which is updated more often, Drilling Engineering or Directional Survey Methods?

Drilling Engineering ships an update every 42 months, and Directional Survey Methods every 50 months. Most recently, Drilling Engineering was updated on October 3, 2026 and Directional Survey Methods on October 1, 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.*