Credit: Courtesy of Swingbyte

This small plastic sensor clips to the club shaft. Once you sync it over Bluetooth, it records your exact swing using the video camera on your phone or tablet (iOS or Android). There's a virtual representation on the left that shows club impact, angle, and speed. On the right, you'll see a video recording. (As with Ubersense, you'll need a buddy along to help record.) The sensor lasts four hours per charge – about the length of a slow round. The app even tracks your total number of swings and provides some pro videos. A bonus: The device is a bit more covert than the similarly specced SwingTIP sensor. [$149; swingbyte.com]