Checking your stats is pretty addicting. It marks goals and logs your progress, tracking different stats depending on the sport. For baseball, it tracks how long your bat stays in the hitting zone, how fast the barrel of your bat is moving when it hits the ball, and the angle of your bat throughout the swing. Golf compares your backswing to your downswing, club speed and angle, swing tempo, and hip rotation. Tennis focuses on the amount of forehands, backhands, serves, and smashes you hit during a match; how much power is generated with each hit; how many topspin, slice, and flat shots you hit based on shot type; and how much time you spend on the court.
What's really handy is that the app doesn't even need to be launched when you play--as long as the sensor is mounted to your racket, bat, or glove, it will track data. Then, when you launch the app later, the data automatically syncs to your device so you can analyze it.
It's a lot of info, but enthusiasts who are seriously working on improving their game are sure to love it. Zepp Baseball, Tennis, and Golf run for $150 apiece, with additional mounts for each sport at $10.
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