Putt Break uses your iPhone's LiDAR sensor to measure the exact slope of a putting green beneath your feet. 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 the line of your putt. Two reticles appear — one on each side of your stance, plus a draggable point ahead of you toward the hole.
Five confidence dots fill as the reading stabilizes. When the dots turn green, your phone gives a small haptic buzz — that's your signal to read.
The big number is total slope. Below it: side break direction and uphill/downhill. Capture the moment as a photo with the readings overlaid for later review.
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.