After you download the App and start it, your app automaticly opens the camera mode. From this "main" screen you can select with a simple tap, different options at the top right corner of your screen.
The Scanner is the "main" screen and opens automaticly, when you start the app. In order to play a track, you need to scan a marker, that is printed on the floor.
The little i is the information regarding the app. You can find information about the author and the art installation.
The playlist option, makes it possible to play the Voices even if you don't have a marker. In order to play a track, you just need to select it and press on the play button.
The question mark gives you an in app tutorial on how to use the app.
In the app you can select one of five languages, to display the writing of the app in. It can be changed anytime.
You can display the voices via AR (Augmented Reality) at the floor and play them. You need to have a little bit of space on the ground, to display them properly.