GreenReadr Downloads & RevenueGreenReadr · App Store

GreenReadr turns your iPhone into a precision green reading tool. Place your phone on the putting surface, and the app instantly measures the slope angle and break direction using your device's built-in accelerometer and gyroscope. No guesswork. No plumb bobbing. Just accurate, real-time slope data in the palm of your hand.

MEASURE THE SLOPE. SEE THE BREAK.
Every golfer has stood over a putt unsure whether it breaks to the left or right, or by how much. GreenReadr removes the doubt. The app displays the slope angle and direction clearly on screen, giving you the information you need to read the green with confidence. Whether it is a subtle half-degree tilt or a sharp two-degree slope, GreenReadr shows you exactly what the green is doing.

DESIGNED FOR PRACTICE. BUILT FOR IMPROVEMENT.
The fastest way to become a better green reader is to calibrate your eyes against real data. Use GreenReadr during practice rounds to verify your reads and build an instinct for slope over time. Read the putt with your eyes first, then check it with GreenReadr. Over weeks and months, you will find yourself reading greens more accurately without even reaching for your phone.
GreenReadr is a practice and training tool. Under the Rules of Golf, slope-measuring devices are not permitted during competitive rounds unless a Local Rule allows it. However, the green reading skills you develop through regular practice with GreenReadr carry straight onto the course.

HOW IT WORKS
Place your iPhone flat on the green surface. GreenReadr immediately reads the slope using your phone's precision sensors and displays the angle and break direction on screen. Pick up your phone, aim your putt, and roll it in. The whole process takes seconds.

KEY FEATURES

- Real-time slope angle measurement
- Clear break direction indicator
- Works entirely offline — no Wi-Fi, mobile data, or GPS required
- No account needed — open the app and start reading
- Works with phone cases and camera bumps (one-time calibration required)
- Clean, distraction-free interface designed for use on the course
- Lightweight and fast — no loading screens, no complicated user interface

NO SUBSCRIPTION. NO ADS. JUST THE READ.
GreenReadr is a one-time purchase. There are no recurring fees, no premium tiers, no ads, and no in-app purchases. Pay once and the app is yours.

PRIVACY FIRST
GreenReadr does not collect, store, or transmit any personal data. The app uses your phone's sensors on-device only. No analytics, no tracking, no third-party SDKs. Your data stays on your phone because we never see it in the first place.

WORKS ON ANY GREEN
GreenReadr works on any putting surface — bent grass, bermuda or even your practice mat at home. If your phone can lie flat on it, GreenReadr can read it.

Whether you are a beginner learning to see slope for the first time, a competitive amateur sharpening your reads before a tournament, or a weekend golfer who simply wants to make more putts, GreenReadr gives you the edge on the gr