Arccos works best with a sensor on every club in your bag, including your putter.
To start a tracked round, you'll need at least 8 clubs paired with sensors. We strongly recommend adding a putter sensor too, since it gives you the most accurate putting stats.
The sensors are small and lightweight and attach to the grip of each club. They automatically track your shots, giving you detailed data about your performance on the course. The more clubs you equip, the more complete your stats will be.
Need more sensors? See Purchasing Additional Arccos Sensors.