The PitchTracker app requires a PitchTracker ball in order for data collection. It includes a demo mode with examples of pitching data to see how the app works. The PitchTracker system (sensor + app) uses motion analytics to unlock in-depth, comprehensive pitching data. - COLLECT: PitchTracker captures throwing motion data in real-time and converts it into easy-to-understand pitching metrics. - ANALYZE: Review the most complete pitching analysis system available, with six detailed metrics and video capture ability. - IMPROVE: Track your progress over time. Use charts and bullpen sessions to improve and analyze your pitching delivery. After your 14-day trial, become a PREMIUM PITCHER for only $9.99 per month or $89.99 annually to gain access to premium features. - Unlock spin rate and all the pitch metrics - See your trends by pitch type - Track your performance over time - Access all of your video history - Connect with teammates and other players Purchase of a PitchTracker ball includes a 14-day trial. The PitchTracker app will still capture limited data without a subscription. See more iTunes payment details below. Premium Hitter payment through iTunes. You can subscribe and pay through your iTunes account. Payment will be charged to iTunes Account at confirmation of purchase. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the current period. Auto-renew may be turned off by going to your Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication. Visit www.diamondkinetics.com to view the Privacy Policy and Terms of Use.