When the device camera is focused on the printed target (image), 3D model of a heart will appear on it. On tapping on the "Start" button the app shows the three coronary arteries and explains their functions. It then guides the user to go ahead and look at the various stages of plaque formation in the coronary artery by tapping on the hotspot on the artery.
The 3D model of the section of the coronary artery demonstrates the various stages of plaque formation.
There are buttons to mute/ unmute the voice over (in case required by the user), skip stages (where required), save the target image to take a print and also to recommend the app to friends.
To skip any stage, tap on the check box for 'Skip'. After skipping one stage, to see the next stage, first tap on 'Skip" button again (to unskip) and then tap on 'Unmute' button to go ahead.