# Het Leerkasteel (Klein) vs Rolf Connect Math

The clearest difference is update cadence: Rolf Connect Math at every 3 months against Het Leerkasteel (Klein)'s every 6 months. Het Leerkasteel (Klein)'s advantage is iOS requirement (9.0 vs 12.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Het Leerkasteel (Klein) ships an update every 6 months, Rolf Connect Math every 3 months. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Het Leerkasteel (Klein) | Rolf Connect Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Size | 59 MB | 251 MB |
| Requires iOS | **9.0** | 12.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dennis van Duin](https://appshunter.io/developer/1141733010) | [De Rolf Groep](https://appshunter.io/developer/1337618432) |

## What reviewers say

### Het Leerkasteel (Klein)

[App page](https://appshunter.io/ios/app/het-leerkasteel-klein/id1268511150)

**Features:** Vision Pro support

**In-app purchases:** none


### Rolf Connect Math

[App page](https://appshunter.io/ios/app/rolf-connect-math/id1457328747)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Het Leerkasteel (Klein) free?

Het Leerkasteel (Klein) is free to download, with no in-app purchases.

### Is Rolf Connect Math free?

Rolf Connect Math is free to download, with no in-app purchases.

### Do Het Leerkasteel (Klein) or Rolf Connect Math have ads?

Neither Het Leerkasteel (Klein) nor Rolf Connect Math shows ads.

### Which is updated more often, Het Leerkasteel (Klein) or Rolf Connect Math?

Het Leerkasteel (Klein) ships an update every 6 months, and Rolf Connect Math every 3 months. Most recently, Het Leerkasteel (Klein) was updated on October 24, 2026 and Rolf Connect Math on October 26, 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.*