Putting drill the Pros use to gauge their improvement. App records 20 putts at 4 set distances scattered around a hole. The goal is to get the highest total distance of makes in the 20 putts. The Pro level uses distances of 5,10,15 and 20 feet from the hole. The total accumulated distance when repeated for 20 putts is 250 feet. To be competitive on the Pro circuit you need to make around 100 feet of putts. Challenge yourself and your buddies to see how you compare. Other levels available are 3,6,9,12 and 4,8,12,16 feet.