The App is installed for free. It requires an in-app purchase for using ShotCatch, which is a standalone golf launch monitor based on iPhones camera without requiring additional sensing devices. It can provide the golf players with the estimation of ball speed, launch angle, azimuth angle, carry distance for their swings/shots. It works in both outdoor and indoor conditions. A min-tripod is used to hold the iPhone. It is also needed to unlock the iPhones screen orientation via the Control Center (refer to the instruction in Help of the app).