We have devised a path breaking mobile application called Accu Foot Size that calculates your shoe size.
It is the only 2D app in the world which gives the length and width of the foot with less than 3 mm margin of error. It also derives the ball girth of the foot with margin of error being less than 4 mm for feet with normal width and thickness.
Accu Foot Size is an interactive app that requires you to take a picture of your foot using your iPhone and perform a few manual operations to arrive at your size. The whole exercise takes less than two minutes.
To determine the shoe size, all you need are the length, the width and the ball girth of the foot. No other device including 2D scanners achieve measurement of the length, width and the ball girth at the same time.
Accu Foot Size incorporates a correlation factor that is based on a survey conducted over a population of 1000 adults. The correlation factor gives indicative foot girth from the foot width where the difference between the actual and calculated foot girth for feet with larger widths and thickness could be slightly more than 4 mm.