# Lazuli 4+ vs Rasend Rechnen

The clearest difference is price: Rasend Rechnen at $0.99 against Lazuli 4+'s $3.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Lazuli 4+ costs $3.99 and Rasend Rechnen $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lazuli 4+ ships an update every 5 months, Rasend Rechnen every 3 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Lazuli 4+ | Rasend Rechnen |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Positive reviews | 94.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 670 MB | 44 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [funline Media GmbH](https://appshunter.io/developer/1220004570) | [Michael Repenning](https://appshunter.io/developer/1600530421) |

## What reviewers say

### Lazuli 4+

[App page](https://appshunter.io/ios/app/lazuli-4-plus/id1291730276)

This educational app offers engaging 3D garden adventures for children aged 4 and up. It features 15 adaptive learning games with multiple difficulty levels to strengthen cognitive skills, including math, memory, and concentration. Parents can also enjoy creative free play modes and track learning progress.

**Highlights:** Adaptive learning games, Cognitive skill development, Math and memory training, Creative free play modes, Parental progress reporting, Child-friendly design

**In-app purchases:** none


### Rasend Rechnen

[App page](https://appshunter.io/ios/app/rasend-rechnen/id1600530419)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lazuli 4+ free?

Lazuli 4+ costs $3.99, with no in-app purchases.

### Is Rasend Rechnen free?

Rasend Rechnen costs $0.99, with no in-app purchases.

### Do Lazuli 4+ or Rasend Rechnen have ads?

Neither Lazuli 4+ nor Rasend Rechnen shows ads.

### Which is updated more often, Lazuli 4+ or Rasend Rechnen?

Lazuli 4+ ships an update every 5 months, and Rasend Rechnen every 3 months. Most recently, Lazuli 4+ was updated on October 24, 2026 and Rasend Rechnen on October 30, 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.*