What if you could duct tape your iPhone to your baseball bat, tennis racquet or 9-iron, and use the iPhone’s motion sensors to plot your swing in your favorite sport? It’d be messy, sure, and awkward, trying to adapt your grip over the slab of phone. And then there’d be the hours of scraping duct-tape residue off the screen when (if) you recovered it from where it landed after it flung itself off during that home-run swing. And after all that you’d need an app that actually made sense of all the data.
Forget all that, and keep your iPhone in your pocket. Zepp Labs has come out with a small, light (1-inch square, 6.3 grams) sensor that attaches, via specialized rubber housings, to golf gloves, baseball bats or a tennis racquets; the sensor records your swing in three dimensions, then sends the data directly to a companion app on your iPhone via Bluetooth. The resulting 3D image of your swing can be viewed from any angle, and gets analyzed by the app.