# CITGO Refinery Worx vs Learn Petroleum Engineering

The clearest difference is review sentiment: CITGO Refinery Worx at 50% against Learn Petroleum Engineering's 0%. CITGO Refinery Worx also leads on price (Free vs $1.99). Learn Petroleum Engineering's advantage is rating (4.5 vs 3.8). On ratings volume, ads, in-app purchases and device support there is nothing between them.

CITGO Refinery Worx is free to download; Learn Petroleum Engineering costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Petroleum Engineering holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews complicate that: 50% of CITGO Refinery Worx's written reviews are positive against 0% of Learn Petroleum Engineering's, so the app with the better star average is not the one people write more warmly about.

## The numbers

| Metric | CITGO Refinery Worx | Learn Petroleum Engineering |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/citgo-refinery-worx/id1472601996/reviews) | **[4.5 (4 ratings)](https://appshunter.io/ios/app/learn-petroleum-engineering/id6448697779/reviews)** |
| Number of ratings | 4 | 4 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | **Free** | Paid |
| Size | 126 MB | 35 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CITGO Petroleum Corp.](https://appshunter.io/developer/407832513) | [Haroon Khalil](https://appshunter.io/developer/1685448939) |

## What reviewers say

### CITGO Refinery Worx

[App page](https://appshunter.io/ios/app/citgo-refinery-worx/id1472601996)

Explore the process of turning crude oil into everyday products through an augmented reality tour. "Build" a virtual refinery and discover how different products are made from the same raw materials. This app is designed for educational purposes and is enjoyable for all ages.

**Highlights:** Augmented reality refinery tour, Animations of refining equipment, Explanations of product creation, Discover building blocks of everyday products, Educational and fun for all ages

**In-app purchases:** none


### Learn Petroleum Engineering

[App page](https://appshunter.io/ios/app/learn-petroleum-engineering/id6448697779)

This app provides a comprehensive guide to petroleum engineering, covering fundamental concepts and advanced topics. It explains the role of petroleum engineers in finding and extracting oil and gas, making processes safer and more efficient.

**Highlights:** Covers all major petroleum engineering topics, Explains working of petroleum machines, Details hydrocarbon extraction methods, Focuses on reservoir management, Discusses enhanced oil recovery techniques, Includes production engineering roles

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

**In-app purchases:** none


## Frequently asked questions

### Is CITGO Refinery Worx free?

CITGO Refinery Worx is free to download, with no in-app purchases.

### Is Learn Petroleum Engineering free?

Learn Petroleum Engineering costs $1.99, with no in-app purchases.

### Which has better reviews, CITGO Refinery Worx or Learn Petroleum Engineering?

Learn Petroleum Engineering is rated higher. CITGO Refinery Worx averages 3.8 out of 5 from 4 ratings, while Learn Petroleum Engineering averages 4.5 from 4 ratings.

### Do CITGO Refinery Worx or Learn Petroleum Engineering have ads?

Neither CITGO Refinery Worx nor Learn Petroleum Engineering shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*