This is a companion app for the ES14 Portable Launch Monitor sold separately at www.ernestsports.com. The ES14 app includes: Range Sessions: Start a new range session or join one that already exists. Session Logs: View data from previously recorded sessions. Club Averages: View averages of all statistical information for each club. Other features include: Multiple viewing options of sessions Emailing capabilities For more information on the app, the ES14 and/or purchasing information please visit our website at www.ernestsports.com.