# Math Bus vs Kiene Klanken

The clearest difference is price: Kiene Klanken at Free against Math Bus's $0.99. Math Bus's advantage is device support (3 vs 1). On update cadence, ads, in-app purchases and iOS requirement there is nothing between them.

Kiene Klanken is free to download; Math Bus costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Math Bus ships an update every 4 months, Kiene Klanken every 2 months. The most recent releases landed on September 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Math Bus | Kiene Klanken |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/kiene-klanken/id1196840254/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 18 MB | 183 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Henk Jurriens](https://appshunter.io/developer/524160208) | [Heutink Primair Onderwijs BV](https://appshunter.io/developer/501293753) |

## What reviewers say

### Math Bus

[App page](https://appshunter.io/ios/app/math-bus/id716831058)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kiene Klanken

[App page](https://appshunter.io/ios/app/kiene-klanken/id1196840254)

This app enhances a physical stamp set for young children learning to read. It allows children to interact with letters, words, and sounds through a tablet, making stamping a rich learning activity with visual and audio support.

**Highlights:** Interactive learning with physical stamps, Playful introduction to letters and words, Audio and visual support for learning, Aligns with early reading methods, Suitable for advanced readers in early grades

**In-app purchases:** none


## Frequently asked questions

### Is Math Bus free?

Math Bus costs $0.99, with no in-app purchases.

### Is Kiene Klanken free?

Kiene Klanken is free to download, with no in-app purchases.

### Do Math Bus or Kiene Klanken have ads?

Neither Math Bus nor Kiene Klanken shows ads.

### Which is updated more often, Math Bus or Kiene Klanken?

Math Bus ships an update every 4 months, and Kiene Klanken every 2 months. Most recently, Math Bus was updated on September 27, 2026 and Kiene Klanken on October 4, 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.*