Mein genialer Körper 3D is a free Android app developed by McDonalds Deutschland LLC under the Education and Reference category. The app is a companion to the book "Mein genialer Körper" and uses augmented reality (AR) technology to bring the images in the book to life.

To use the app, users need to scan a page in the book with a red "AR+" symbol. The app then displays interactive 3D models of the body parts shown in the book. Users can navigate the AR world using simple gestures and their fingers. The app also provides options to take photos and videos of the models and save them on their device.

The app is designed for kids and does not contain any ads. It is an excellent tool to engage children in learning about the human body in a fun and interactive way.