An app that allows customers to browse and buy shoes via their smartphone. When it gets to the point where they're asked to select a size, they'll start by standing against a wall in their sock-clad feet. They will then point their phone's rear camera down at those feet, using an onscreen guide to make sure that the phone is being held horizontally level. The app will subsequently use the camera to visually identify and scan both feet, collecting 13 data points on each one within a matter of seconds.

That data will next be processed utilizing AI algorithms, determining which shoe size will best fit the user – that size may be different for different shoe models. The app will remember each user's foot-scan data, so they don't have to perform a new scan every time they're buying new shoes.

[Source]