# Memory Brain Trainer (Math) vs Het Leerkasteel

The clearest difference is price: Memory Brain Trainer (Math) at Free against Het Leerkasteel's $1.99. Memory Brain Trainer (Math) also leads on ads (none vs shown) and update cadence (every 3 months vs every 27 months). On in-app purchases and device support there is nothing between them.

Memory Brain Trainer (Math) is free to download; Het Leerkasteel costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Memory Brain Trainer (Math) ships an update every 3 months, Het Leerkasteel every 27 months. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Memory Brain Trainer (Math) | Het Leerkasteel |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 27 months |
| Size | 57 MB | 42 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KIDEO TECH LTD](https://appshunter.io/developer/905104364) | [Dennis van Duin](https://appshunter.io/developer/1141733010) |

## What reviewers say

### Memory Brain Trainer (Math)

[App page](https://appshunter.io/ios/app/memory-brain-trainer-math/id1020432770)

**Features:** macOS Compatibility

**In-app purchases:** none


### Het Leerkasteel

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

**In-app purchases:** none


## Frequently asked questions

### Is Memory Brain Trainer (Math) free?

Memory Brain Trainer (Math) is free to download, with no in-app purchases.

### Is Het Leerkasteel free?

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

### Do Memory Brain Trainer (Math) or Het Leerkasteel have ads?

Het Leerkasteel shows ads; Memory Brain Trainer (Math) does not.

### Which is updated more often, Memory Brain Trainer (Math) or Het Leerkasteel?

Memory Brain Trainer (Math) ships an update every 3 months, and Het Leerkasteel every 27 months. Most recently, Memory Brain Trainer (Math) was updated on September 28, 2026 and Het Leerkasteel on September 23, 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.*