# Directional Drilling vs Learn Khmer

The clearest difference is price: Learn Khmer at Free against Directional Drilling's $29.99. Learn Khmer also leads on update cadence (every 4 months vs every 8 months). Directional Drilling's advantage is in-app purchases (none vs 3) and ads (none vs shown). On review sentiment and device support there is nothing between them.

Learn Khmer is free to download; Directional Drilling costs $29.99 up front. Learn Khmer sells 3 in-app purchases, starting at $4.99 per 7 days. Directional Drilling asks for nothing beyond the download.

Directional Drilling ships an update every 8 months, Learn Khmer every 4 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Directional Drilling | Learn Khmer |
| --- | --- | --- |
| Price | $29.99 | **Free** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 4 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 21 MB | 24 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Atech Consultancy Ltd](https://appshunter.io/developer/1818884485) |

## What reviewers say

### Directional Drilling

[App page](https://appshunter.io/ios/app/directional-drilling/id928989079)

This application provides essential tools for oil and gas directional drilling. It aids in well planning, survey data management, and 3D plotting. Users can import and export data, perform various calculations, and visualize well paths.

**Highlights:** Well planning with multiple sections, Import/export survey data, Multiple calculation methods, 2D and 3D well plotting, Support for length units (foot/meter), Multilateral well plotting

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

**In-app purchases:** none


### Learn Khmer

[App page](https://appshunter.io/ios/app/learn-khmer-lentil/id1437854270)

Master Khmer with practical phrases and real-life conversations. This app offers synchronized audio and text, smart memorization tools, and structured lessons to build speaking confidence for travelers and beginners.

**Highlights:** Audio + text synchronization, Practical phrasebook lessons, Flashcards for memorization, Favorites for personalized learning, 100+ structured learning topics, 2000+ useful phrases

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly Subscription | $24.99 | per year |
| Lifetime Premium | $29.99 | one-time |


## Frequently asked questions

### Is Directional Drilling free?

Directional Drilling costs $29.99, with no in-app purchases.

### Is Learn Khmer free?

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

### Do Directional Drilling or Learn Khmer have ads?

Learn Khmer shows ads; Directional Drilling does not.

### Which is updated more often, Directional Drilling or Learn Khmer?

Directional Drilling ships an update every 8 months, and Learn Khmer every 4 months. Most recently, Directional Drilling was updated on November 1, 2026 and Learn Khmer on November 2, 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.*