PerfectMotion® has upgraded the user experience in its industry-leading A.I.-powered, motion training mobile app by introducing the PPI, PerfectMotion® Performance Index. PPI is a numerical measure of motion efficiency from 0 to 100. As golfers work with the app toward the goal of repeatable, efficient body motion with every club, their PPI scores help them measure their success, track improvements, focus their efforts and challenge themselves.