# Blitzrechnen vs KLARO App

The clearest difference is review sentiment: KLARO App at 100% against Blitzrechnen's 19%. KLARO App also leads on in-app purchases (none vs 4) and update cadence (every 6 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Blitzrechnen sells 4 one-off in-app purchases. KLARO App asks for nothing beyond the download.

Blitzrechnen ships an update every 3 months, KLARO App every 6 days. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Blitzrechnen | KLARO App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 18.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 196 MB | 167 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ernst Klett Verlag GmbH, Stuttgart](https://appshunter.io/developer/751540887) | [Verein Programm Klasse2000 e.V.](https://appshunter.io/developer/1707335300) |

## What reviewers say

### Blitzrechnen

[App page](https://appshunter.io/ios/app/blitzrechnen/id6444187170)

Practice math skills for grades 1-4 with adaptive exercises. Learn independently through engaging, game-like activities that reinforce concepts and build confidence. Offline access ensures continuous learning at home or in the classroom.

**Highlights:** Adaptive exercises for grades 1-4, Multiple difficulty levels, Self-assessment tests, Progress tracking for parents/teachers, Offline functionality, Engaging animations

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Klasse 1 | $2.99 | one-time |
| Blitzrechnen 4 | $2.99 | one-time |
| Klasse 2 | $2.99 | one-time |
| Klasse 3 | $2.99 | one-time |


### KLARO App

[App page](https://appshunter.io/ios/app/klaro-app/id6466402729)

This app offers engaging movement breaks and relaxation exercises inspired by a popular school health program. It provides 63 guided activities, including breathing techniques and story-based relaxation, to promote well-being for children and families. The content is accessible offline and includes resources for parents.

**Highlights:** Guided movement breaks, Relaxation exercises, Breathing techniques, Story-based relaxation, Offline access, Parental resources

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Blitzrechnen free?

Blitzrechnen is free to download, with in-app purchases available.

### Is KLARO App free?

KLARO App is free to download, with no in-app purchases.

### Do Blitzrechnen or KLARO App have ads?

Neither Blitzrechnen nor KLARO App shows ads.

### Which is updated more often, Blitzrechnen or KLARO App?

Blitzrechnen ships an update every 3 months, and KLARO App every 6 days. Most recently, Blitzrechnen was updated on September 22, 2026 and KLARO App on September 16, 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.*