Data-tracking sensors are becoming popular across the world of sports. In golf, we've seen this type of technology before from startups like Zepp, which created a swing analyzer that attaches to a player's glove. And now, Garmin is ready to do something similar. The company has introduced its TruSwing, a small and lightweight gadget for golfers who want to know more details about their time on the course. When paired with Garmin's Connect Mobile app, available for iOS and Android, the accessory delivers 3D animations to give you instant feedback on your swing.