Plumb Bob: Golf Green Reader

Plumb Bob turns your iPhone into a green reader. Golfers have plumb-bobbed putts with a putter shaft for a hundred years. Plumb Bob gives you a truly vertical line from the phone's sensors, maps the slope of the whole putt as you walk from your ball to the cup, and rolls test putts over it at the green's speed. The line, the aim spot and the break appear on the grass in about twenty seconds. BALL. HOLE. PLUMB. • Mark your ball, walk your line to the hole and aim at the cup • Stand behind the ball and hold the phone up: the plumb line shows which way it breaks • See the putting line on the green, where to aim, how much it breaks and how long it plays GREEN SPEED FROM ONE ROLL • Roll any ball 8–15 ft and Plumb Bob measures the Stimp • Roll one back the other way to cancel out slope • Or pick Slow, Medium, Fast or Tour YOUR PUTTING SCORE • Play a round and every putt you read is scored…