Putt Break: Golf Green Reader

Read any green like you've got a tour caddie in your pocket. Set your phone on the green, and it measures the slope and tells you exactly how much your putt breaks — based on green speed and distance. Real physics, no guessing.

HOW TO USE

1. Behind your ball, find your line to the hole.

2. Lay the phone flat on the green, screen up, perpendicular to your line.

3. Read the break, aim, drain it. (Or don't. We've done our part.)

FLAT PHONE = ACCURATE READ

Got a camera bump? Keep your phone in its case (the raised edge levels it out), or even easier: tap Calibrate to Level on any flat, level surface and the app zeroes your phone out for good. The screen stays awake while you work the green.

WHAT YOU GET

• Live slope and direction from your phone's sensors

• Exact break in inches, measured from the edge of the cup

• "Plays like X feet" so you know how hard to hit it

• A visual aim line and ball path, plus an overhead green view

• Green speed (stimp) and putt length up to 40 feet

FAIR WARNING

This is 100% not legal for tournament play — reading greens with a device breaks Rule 4.3, so consider this a practice-round and bar-bet tool only. Then again, your putting probably isn't winning any tournaments either, so... we're good.