# SkyTest BU/GU Preparation App vs Der Kopfrechner

The clearest difference is price: Der Kopfrechner at Free against SkyTest BU/GU Preparation App's $89.99. Der Kopfrechner also leads on update cadence (fortnightly vs every 3 months). SkyTest BU/GU Preparation App's advantage is iOS requirement (15.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Der Kopfrechner is free to download; SkyTest BU/GU Preparation App costs $89.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SkyTest BU/GU Preparation App ships an update every 3 months, Der Kopfrechner fortnightly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SkyTest BU/GU Preparation App | Der Kopfrechner |
| --- | --- | --- |
| Price | $89.99 | **Free** |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 429 MB | 0 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Aviation Media & IT GmbH](https://appshunter.io/developer/504134961) | [SEBASTIAN SIMON MARTIN NEHLS](https://appshunter.io/developer/1782780647) |

## What reviewers say

### SkyTest BU/GU Preparation App

[App page](https://appshunter.io/ios/app/skytest-bugu-preparation-app/id775751981)

Prepare for pilot aptitude tests with a comprehensive suite of training modules covering attention, memory, spatial orientation, psychomotor skills, math, logic, physics, technical comprehension, and English. Features include detailed explanations, customizable difficulty levels, performance analysis, and progress tracking to optimize your training outcome.

**Highlights:** 41 training modules, Bilingual (English/German), Interactive demos, Customizable difficulty, Performance analysis, Progress tracking, Training Assistant

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

**In-app purchases:** none


### Der Kopfrechner

[App page](https://appshunter.io/ios/app/der-kopfrechner/id6738890372)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SkyTest BU/GU Preparation App free?

SkyTest BU/GU Preparation App costs $89.99, with no in-app purchases.

### Is Der Kopfrechner free?

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

### Do SkyTest BU/GU Preparation App or Der Kopfrechner have ads?

Neither SkyTest BU/GU Preparation App nor Der Kopfrechner shows ads.

### Which is updated more often, SkyTest BU/GU Preparation App or Der Kopfrechner?

SkyTest BU/GU Preparation App ships an update every 3 months, and Der Kopfrechner fortnightly. Most recently, SkyTest BU/GU Preparation App was updated on October 15, 2026 and Der Kopfrechner on October 13, 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.*