# Java und Datenbanken vs IQ Test Challenge

The clearest difference is in-app purchases: Java und Datenbanken at none against IQ Test Challenge's 2. Java und Datenbanken also leads on iOS requirement (11.0 vs 15.0). IQ Test Challenge's advantage is update cadence (every 3 days vs every 16 months). On price, ads and device support there is nothing between them.

Both are free to download. IQ Test Challenge sells 2 in-app purchases, starting at $1.99 per month. Java und Datenbanken asks for nothing beyond the download.

Java und Datenbanken ships an update every 16 months, IQ Test Challenge every 3 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Java und Datenbanken | IQ Test Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 days** |
| Size | 13 MB | 16 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eberhard Heuel](https://appshunter.io/developer/881793184) | [Paul Stelzer](https://appshunter.io/developer/644648487) |

## What reviewers say

### Java und Datenbanken

[App page](https://appshunter.io/ios/app/java-und-datenbanken/id1117386178)

**Features:** macOS Compatibility

**In-app purchases:** none


### IQ Test Challenge

[App page](https://appshunter.io/ios/app/iq-test-challenge/id6816346720)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Club Monthly | $1.99 | per month |
| Club Yearly | $8.99 | per year |


## Frequently asked questions

### Is Java und Datenbanken free?

Java und Datenbanken is free to download, with no in-app purchases.

### Is IQ Test Challenge free?

IQ Test Challenge is free to download, with in-app purchases available.

### Do Java und Datenbanken or IQ Test Challenge have ads?

Neither Java und Datenbanken nor IQ Test Challenge shows ads.

### Which is updated more often, Java und Datenbanken or IQ Test Challenge?

Java und Datenbanken ships an update every 16 months, and IQ Test Challenge every 3 days. Most recently, Java und Datenbanken was updated on October 26, 2026 and IQ Test Challenge on October 25, 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.*