Dragy
Dragy uses high speed GPS satellites to accurately measure your vehicles performance within 1/100th of a second on any make of cars. Producing identical results to the much more expensive and cumbersome VBOX system, in a less expensive and easier to use package. The Dragy software automatically charts slope on all timeslips which you can then post to forums or social media, share with friends, or even upload to the Dragy leader board.