ACT Head Impact Tracker makes the forces acting on an athlete's head visible and measurable. A small head sensor — attachable to almost any headband, hairband or helmet — pairs with the ACT smartphone app to record the number, frequency and magnitude of impacts, from g-force and impact g-load to angular velocity on the Pro sensor.

Data flows in near real time to the app, a web analytics tool and a team dashboard for coaches and clubs, turning head impacts into objective information that supports safer technique, better-informed decisions and a wider shift in how impact is understood in sport.