Putt Break uses your iPhone's LiDAR sensor to measure the exact slope of a putting green beneath your feet — then the distance from your stance to the hole. A learning aid for golfers who want to read greens with physics, not just feel.
Most green-reading methods give you a feeling. Putt Break gives you a measurement — slope as a percentage, broken down by side break and uphill/downhill, with a confidence indicator so you know when to trust the read.
The LiDAR sensor on iPhone Pro models can resolve sub-centimeter height differences. Putt Break aligns those readings to true gravity (not the floor plane), averages dozens of samples, and tells you what your feet can't feel.
Hold your iPhone over your stance. Five confidence dots fill as the reading stabilizes — when they turn green, a small haptic buzz tells you the read is trustworthy. The big number is total slope, with side break and uphill/downhill below.
Once you have a confident slope reading, switch to Distance mode and aim toward the hole. Putt Break measures the length of the putt from where you stand — in meters or feet, your choice.
Now you know the surface and the distance. Capture the moment as a photo with the readings overlaid for later review — then read it with your own eyes and stroke the putt.
Putt Break doesn't tell you where to aim. It doesn't predict where your ball will end up. It doesn't account for green speed, wind, grain, or the way your putter sits in your hand.
What it does is measure the slope of the ground. Honestly. To a precision your feet cannot feel.
That's the point. The number is yours to interpret, combine with your feel, and translate into a putt. Putt Break is the tape measure, not the carpenter.
A note on tournament use: Putt Break is intended for practice rounds and learning. It is not for use during tournament play. Rule 4.3 of the Rules of Golf prohibits electronic devices that measure slope during a stipulated round. Always check your club's specific rules.