# Gas Turbines vs Airline Selection Programme

The clearest difference is price: Airline Selection Programme at Free against Gas Turbines's $9.99. Airline Selection Programme also leads on update cadence (every 3 months vs every 43 months) and iOS requirement (15.2 vs 17.4). Gas Turbines's advantage is in-app purchases (none vs 22). On ads and device support there is nothing between them.

Airline Selection Programme is free to download; Gas Turbines costs $9.99 up front. Airline Selection Programme sells 22 one-off in-app purchases. Gas Turbines asks for nothing beyond the download.

Gas Turbines ships an update every 43 months, Airline Selection Programme every 3 months. The most recent releases landed on October 22, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Gas Turbines | Airline Selection Programme |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/gas-turbines/id1210385891/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 43 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 225 MB | 110 MB |
| Requires iOS | 17.4 | **15.2** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Padpilot Limited](https://appshunter.io/developer/413253261) | [GD Aviation Solutions](https://appshunter.io/developer/1691286905) |

## What reviewers say

### Gas Turbines

[App page](https://appshunter.io/ios/app/gas-turbines/id1210385891)

Explore the design, construction, and function of a modern triple spool gas turbine engine through interactive 3D models. This educational tool provides a foundational understanding for aspiring aviation professionals and a refresher for experienced ones.

**Highlights:** Interactive 3D gas turbine engine model, Component visualization and animation, Detailed summaries of design and construction, Identification of threats and errors, Unique navigation wheels for engine assembly, Foundational ATPL theory learning

**Features:** Vision Pro support

**In-app purchases:** none


### Airline Selection Programme

[App page](https://appshunter.io/ios/app/airline-selection-programme/id6449971565)

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

**In-app purchases (22)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pilote d'Air France / Partie 1 | Free | one-time |
| Wizzair Selections / Part 1 | Free | one-time |
| Low Cost Irish Airline/ Part 1 | Free | one-time |
| Low Cost Irish Airline Part 1 | Free | one-time |
| British Airways / Part 1 | Free | one-time |
| Becoming a Pilot / Part 1 | Free | one-time |
| 10 Things you should know | Free | one-time |
| Wizzair Selections / Part 2 | $34.99 | one-time |
| Low Cost Irish Airline/ Part 2 | $34.99 | one-time |
| Pilote d'Air France / Partie 2 | $89.00 | one-time |
| CV and Cover Letter Course | $99.99 | one-time |
| Wizzair Selections / Part 2 | $179.00 | one-time |
| Effective Communication | $179.00 | one-time |
| Generation easyJet Selections | $179.00 | one-time |
| English Proficiency Course | $249.00 | one-time |
| English Proficiency Course | $250.00 | one-time |
| flydubai Selections / Part 2 | $250.00 | one-time |
| British Airways / Part 2 | $250.00 | one-time |
| Sim Preparation Course | $399.99 | one-time |
| Sim Preparation Course | $450.00 | one-time |
| Operational Procedures | $450.00 | one-time |
| Advanced Interview Course | $900.00 | one-time |


## Frequently asked questions

### Is Gas Turbines free?

Gas Turbines costs $9.99, with no in-app purchases.

### Is Airline Selection Programme free?

Airline Selection Programme is free to download, with in-app purchases available.

### Do Gas Turbines or Airline Selection Programme have ads?

Neither Gas Turbines nor Airline Selection Programme shows ads.

### Which is updated more often, Gas Turbines or Airline Selection Programme?

Gas Turbines ships an update every 43 months, and Airline Selection Programme every 3 months. Most recently, Gas Turbines was updated on October 22, 2026 and Airline Selection Programme on October 27, 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.*