Vertex Golf app for iPhone and iPad

VERTEX SmartCore is a Motion sensor device that is inserted in to your putter head, giving you the most realistic and detailed putting data & stats available for your putting stroke. The Vertex Golf App (iOS), is designed to be simple and intuitive. To aid you on a daily, monthly or ad-hoc basis to further understand and improve your putting stroke!

From simple data grids, to personalised explanations and tips, all focussed on your key target areas for improvement. Compare yourself to fellow golfers and/or professionals. The power is literally in your hands.
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/