This app would start by using the smartphone's camera to take an image of someone you encounter at random (you have to point the camera appropriately, of course).
The app would then use the image to create a 3D model of the person, which would be stored on the phone. The app would then use the phone's GPS to determine the person's location, and would then send a text message to the person's phone with a link to the 3D model. The person