Right now, gesture control in virtual reality typically requires an expensive PC and specialized sensors. But what if you can only afford (or simply prefer) VR on your phone? Don't worry, you're covered. EyeSight Technologies has developed gesture control that uses your phone's rear camera to allow touch-free input. It should work with any Android or iOS device, and it isn't picky about headsets. Anything from Gear VR to Google Cardboard should work, although we can't imagine Cardboard owners having much luck if they don't have a head strap.