I am extremely skeptical. Why? Because if you're using your phone to measure PD, you're presumably looking at the phone as you do so and your pupils are converged compared to a PD measurement when focusing at a distant (near infinity) object. It's not clear to me how using a 3d sensor to scan a face solves this problem and why this would be superior to the "focus on something far away and put dots on an old pair of glasses" method described here: http://www.daniellivingston.com/2012/06/measuring-your-own-p...