# Mack Masters Competition vs Petroleum Engineering+

The clearest difference is in-app purchases: Mack Masters Competition at none against Petroleum Engineering+'s 6. Petroleum Engineering+'s advantage is update cadence (monthly vs every 42 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Petroleum Engineering+ sells 6 in-app purchases, starting at $9.99 per month. Mack Masters Competition asks for nothing beyond the download.

Mack Masters Competition ships an update every 42 months, Petroleum Engineering+ monthly. The most recent releases landed on October 4, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Mack Masters Competition | Petroleum Engineering+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/petroleum-engineering-plus/id6746214573/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 18 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Mack Trucks, Inc.](https://appshunter.io/developer/421834196) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### Mack Masters Competition

[App page](https://appshunter.io/ios/app/mack-masters-competition/id6446115683)

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

**In-app purchases:** none


### Petroleum Engineering+

[App page](https://appshunter.io/ios/app/petroleum-engineering-plus/id6746214573)

Master petroleum engineering concepts through engaging quizzes covering a wide range of topics from geology to production. Ideal for students and professionals seeking to enhance their knowledge and skills in the oil and gas industry.

**Highlights:** Comprehensive quiz coverage, Topics from geology to production, Boost knowledge and skills, Engaging learning experience, Suitable for students and professionals

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is Mack Masters Competition free?

Mack Masters Competition is free to download, with no in-app purchases.

### Is Petroleum Engineering+ free?

Petroleum Engineering+ is free to download, with in-app purchases available.

### Do Mack Masters Competition or Petroleum Engineering+ have ads?

Neither Mack Masters Competition nor Petroleum Engineering+ shows ads.

### Which is updated more often, Mack Masters Competition or Petroleum Engineering+?

Mack Masters Competition ships an update every 42 months, and Petroleum Engineering+ monthly. Most recently, Mack Masters Competition was updated on October 4, 2026 and Petroleum Engineering+ on September 23, 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.*