# Calculation Triangle vs RiCHTiG Zuhören

The clearest difference is update cadence: Calculation Triangle at every 27 months against RiCHTiG Zuhören's every 61 months. Calculation Triangle also leads on price ($0.99 vs $2.99). RiCHTiG Zuhören's advantage is iOS requirement (13.0 vs 15.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Calculation Triangle costs $0.99 and RiCHTiG Zuhören $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calculation Triangle ships an update every 27 months, RiCHTiG Zuhören every 61 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Calculation Triangle | RiCHTiG Zuhören |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/calculation-triangle/id575736731/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 30.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 27 months** | Every 61 months |
| Monetization | Paid | Paid |
| Size | 48 MB | 304 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Christian Urff](https://appshunter.io/developer/415894463) | [Westermann Digital GmbH](https://appshunter.io/developer/1171669560) |

## What reviewers say

### Calculation Triangle

[App page](https://appshunter.io/ios/app/calculation-triangle/id575736731)

This app transforms a primary school math exercise into an interactive virtual manipulative. Children place counters or numbers within a triangle, and the app dynamically updates the outer sums. It offers various representations, problem types, and guided investigation cards to foster mathematical exploration.

**Highlights:** Virtual manipulative for math triangles, Interactive counter and number placement, Multiple visual representations, Cover and guess functionality, Addition and multiplication tasks, 33 investigation cards with videos, Printable worksheets and activity log

**Features:** macOS Compatibility

**In-app purchases:** none


### RiCHTiG Zuhören

[App page](https://appshunter.io/ios/app/richtig-zuhoren/id1490227199)

This app helps primary school children (grades 1-4) playfully practice listening comprehension, concentration, and memory skills. It features five game types with three difficulty levels, set in a charming world with engaging characters. Children can also expand their vocabulary, especially those learning German as a second language.

**Highlights:** Listening comprehension practice, Concentration and memory training, Vocabulary expansion, Five game types, Three difficulty levels, Engaging characters and world

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculation Triangle free?

Calculation Triangle costs $0.99, with no in-app purchases.

### Is RiCHTiG Zuhören free?

RiCHTiG Zuhören costs $2.99, with no in-app purchases.

### Do Calculation Triangle or RiCHTiG Zuhören have ads?

Neither Calculation Triangle nor RiCHTiG Zuhören shows ads.

### Which is updated more often, Calculation Triangle or RiCHTiG Zuhören?

Calculation Triangle ships an update every 27 months, and RiCHTiG Zuhören every 61 months. Most recently, Calculation Triangle was updated on November 1, 2026 and RiCHTiG Zuhören on November 3, 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.*