Measure your green speed & hardness with a real ball.
Golf Green Tester is a smart golf ball with a built-in motion sensor. Roll it, drop it, and get concrete numbers on putting green speed and surface hardness — so you can train and care for your greens with real data instead of guesswork.
BLE
Connects to your iPhone20 Hz
Live motion dataRoll + Drop
Two test modesCSV
Export your dataFrom a roll to a number in seconds
No extra equipment — the ball carries the sensor, and your phone turns it into a clear reading.
Pair with the app
The ball talks to your iPhone over Bluetooth. Open the app, tap scan, and connect.
Roll or drop it
Choose Roll mode to measure distance and green speed, or Drop mode to test hardness with an impact.
Enter the true value
Read the Stimpmeter number off your green and the hardness. The app stores the sensor data with your label for training.
Built for real green data
One-tap Bluetooth pairing
Scan and connect to the ball in seconds. Live sensor data flows straight to your phone.
Automatic roll detection
The app knows when a roll starts and stops, records the duration and motion, and measures the result.
Impact drop detection
Drop it on the surface and capture the peak force to gauge hardness and firmness.
Training labels
Enter the green speed and hardness after each test so the data it learns can improve over time.
History & export
Every test is saved and can be exported as CSV to your phone's Files app for analysis on any computer.
See the battery live
The app shows the ball's charge, so you know when it's time to top up before you head out.
Small ball. Serious sensor.
Everything you need to know before you decide.
Ready to see your greens in numbers?
Grab the Golf Green Tester app and pair it with the ball. Simple to use, built for real data.
Download the app →Coming soon to the App Store. Questions? Contact us.