App Store, Play Store
The app is almost available in the App Store and Play Store
Marker for Augmented Reality
GreyMapp uses AR-Kit (iOS) and ARCore (Android) for the augmented reality capabilities. In case your device doesn’t natively support these techniques there is a fallback using a marker.
You can download the marker here: Brain Marker
In order to use the marker, print it with your favourite pdf reader. Make sure that when you print it, you will use no scaling or resizing (print at 100% size).