# IST Quiz App vs Learn Control Systems

The clearest difference is in-app purchases: IST Quiz App at none against Learn Control Systems's 1. IST Quiz App also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Learn Control Systems sells 1 one-off in-app purchase. IST Quiz App asks for nothing beyond the download.

IST Quiz App ships an update every 12 months, Learn Control Systems every 16 months. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | IST Quiz App | Learn Control Systems |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 16 months |
| Size | 22 MB | 28 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Patricia Pauli](https://appshunter.io/developer/1587769862) | [Ghumman Tech LLC](https://appshunter.io/developer/1671347750) |

## What reviewers say

### IST Quiz App

[App page](https://appshunter.io/ios/app/ist-quiz-app/id1491663052)

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn Control Systems

[App page](https://appshunter.io/ios/app/learn-control-systems/id6446431258)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $9.99 | one-time |


## Frequently asked questions

### Is IST Quiz App free?

IST Quiz App is free to download, with no in-app purchases.

### Is Learn Control Systems free?

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

### Do IST Quiz App or Learn Control Systems have ads?

Neither IST Quiz App nor Learn Control Systems shows ads.

### Which is updated more often, IST Quiz App or Learn Control Systems?

IST Quiz App ships an update every 12 months, and Learn Control Systems every 16 months. Most recently, IST Quiz App was updated on September 15, 2026 and Learn Control Systems on September 9, 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.*