# Onilo vs Blitzrechnen

The clearest difference is in-app purchases: Onilo at none against Blitzrechnen's 4. Blitzrechnen's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Onilo | Blitzrechnen |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 18.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 196 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [StoryDOCKS GmbH](https://appshunter.io/developer/1523051642) | [Ernst Klett Verlag GmbH, Stuttgart](https://appshunter.io/developer/751540887) |

## What reviewers say

### Onilo

[App page](https://appshunter.io/ios/app/onilo/id1523051643)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Onilo free?

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

### Is Blitzrechnen free?

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

### Do Onilo or Blitzrechnen have ads?

Neither Onilo nor Blitzrechnen shows ads.

### Which is updated more often, Onilo or Blitzrechnen?

Onilo ships an update every 3 months, and Blitzrechnen every 3 months. Most recently, Onilo was updated on September 13, 2026 and Blitzrechnen on September 22, 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.*