# Het Leerkasteel vs CaQ Arithmetic Premium

The clearest difference is ads: CaQ Arithmetic Premium at none against Het Leerkasteel's shown. CaQ Arithmetic Premium also leads on update cadence (every 10 months vs every 27 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Het Leerkasteel costs $1.99 and CaQ Arithmetic Premium $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Het Leerkasteel ships an update every 27 months, CaQ Arithmetic Premium every 10 months. The most recent releases landed on October 26, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Het Leerkasteel | CaQ Arithmetic Premium |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 27 months | **Every 10 months** |
| Size | 42 MB | 43 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dennis van Duin](https://appshunter.io/developer/1141733010) | [Manus Breuking](https://appshunter.io/developer/942279297) |

## What reviewers say

### Het Leerkasteel

[App page](https://appshunter.io/ios/app/het-leerkasteel/id1268516284)

**In-app purchases:** none


### CaQ Arithmetic Premium

[App page](https://appshunter.io/ios/app/caq-arithmetic-premium/id1499393915)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Het Leerkasteel free?

Het Leerkasteel costs $1.99, with no in-app purchases.

### Is CaQ Arithmetic Premium free?

CaQ Arithmetic Premium costs $1.99, with no in-app purchases.

### Do Het Leerkasteel or CaQ Arithmetic Premium have ads?

Het Leerkasteel shows ads; CaQ Arithmetic Premium does not.

### Which is updated more often, Het Leerkasteel or CaQ Arithmetic Premium?

Het Leerkasteel ships an update every 27 months, and CaQ Arithmetic Premium every 10 months. Most recently, Het Leerkasteel was updated on October 26, 2026 and CaQ Arithmetic Premium on October 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.*