Construct a 3d model from the front side and back pictures. Use that 3D model to measure circumference measurements and input those measurements into a percent body fat meter. Halo app and styku already do similar calculations. Yes, the formulas are not the most accurate but that can be said for several methods, from calipers to bio-impedance. The idea is to make it easier for the clients and there are already photos that are inputted and a place on the app for body measurements to be placed. Just adds a 3D model and an additional formula.