Terms of use

1. Provider

The Mentrim app is provided by Nico Gruhn, Gustav-Seitz-Straße 4, 68163 Mannheim, Germany (see imprint).

2. Independent training app

Mentrim is an independent product. It is not affiliated with, endorsed by, or connected to DLR (German Aerospace Center), Lufthansa Group, European Flight Academy, any fire service or authority, the German Psychological Society (DGPs), TransMIT, or any other testing organisation or employer. All tasks are original exercises modelled on publicly described task types; they are not taken from any official test.

3. No guarantee of success

The app supports your preparation. It does not guarantee any particular result in a real selection procedure, and results in the app do not predict results in a real test. Specialist content (e.g. fire service knowledge, physics) is prepared with care but does not replace training or official documents.

4. Minimum age

The app is intended for people aged 16 and over.

5. Free version and packages

Every test can be tried for free. The package of a goal (e.g. pilot or fire service) unlocks all levels, all questions, all simulations and the complete study plan for that goal. A package is a one-time purchase without a subscription and applies to the Apple ID or Google account used to buy it. Purchase, payment, refunds and the right of withdrawal are governed by the statutory provisions and the terms of the respective store (Apple or Google).

Only the store decides on refunds. If you request a refund, the store asks us for information; we then tell it that the package was unlocked, that you could try the app for free beforehand, and our view on the refund. You agree to this by buying. After a refund the package is locked again.

6. Rights of use

You may use the app and its content for your personal preparation. You may not copy, publish or commercially exploit content of the app (e.g. questions, explanations, graphics).

7. Changes and availability

We keep developing the app. We may change the app and its content if there is a valid reason, in particular to adapt to new versions of iOS or Android, for security reasons, because of changes in the law, to fix errors or to improve and extend the content. A change causes you no additional costs. We inform you about changes clearly and understandably, e.g. in the release notes in the App Store or on Google Play. If a change impairs the use of a purchased package more than insignificantly, we inform you in good time beforehand; you can then end the contract free of charge within 30 days (Section 327r BGB). The app works offline; some features (buying, restoring, links) need an internet connection.

8. Liability

We are liable without limitation for intent and gross negligence, for injury to life, body or health and under the Product Liability Act. For slight negligence we are liable only for breach of an essential contractual obligation and limited to the foreseeable damage typical for the contract. Essential contractual obligations are obligations whose fulfilment makes the proper performance of the contract possible in the first place and on whose observance you may regularly rely. Your statutory rights in case of defects of a purchased package remain unaffected.

9. Community

Our Discord server is subject to the rules published there and to Discord's terms. Please do not share original items from real tests there.

10. Final provisions

German law applies. If you are a consumer, the mandatory protective provisions of the country where you live remain unaffected. Last updated: 7 October 2026.