# Château de Prangins vs AST CST Exam Test

The clearest difference is in-app purchases: Château de Prangins at none against AST CST Exam Test's 2. Château de Prangins also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.2). AST CST Exam Test's advantage is update cadence (every 4 weeks vs every 6 months). On price and ads there is nothing between them.

Both are free to download. AST CST Exam Test sells 2 in-app purchases, starting at $9.99 per month. Château de Prangins asks for nothing beyond the download.

Château de Prangins ships an update every 6 months, AST CST Exam Test every 4 weeks. The most recent releases landed on November 6, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Château de Prangins | AST CST Exam Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 weeks** |
| Size | 29 MB | 9 MB |
| Requires iOS | **15.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Schweizerisches Nationalmuseum](https://appshunter.io/developer/501960221) | [Cargo Teleport Inc](https://appshunter.io/developer/1761832181) |

## What reviewers say

### Château de Prangins

[App page](https://appshunter.io/ios/app/chateau-de-prangins/id619086439)

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

**In-app purchases:** none


### AST CST Exam Test

[App page](https://appshunter.io/ios/app/ast-cst-exam-test/id6736717763)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium monthly subscription | $9.99 | per month |
| Lifetime version | $19.99 | one-time |


## Frequently asked questions

### Is Château de Prangins free?

Château de Prangins is free to download, with no in-app purchases.

### Is AST CST Exam Test free?

AST CST Exam Test is free to download, with in-app purchases available.

### Do Château de Prangins or AST CST Exam Test have ads?

Neither Château de Prangins nor AST CST Exam Test shows ads.

### Which is updated more often, Château de Prangins or AST CST Exam Test?

Château de Prangins ships an update every 6 months, and AST CST Exam Test every 4 weeks. Most recently, Château de Prangins was updated on November 6, 2026 and AST CST Exam Test on September 15, 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.*