A 3D camera is expensive. A smartphone with an attachment that turns it into a 3D camera is not. I mean, you’ve already bought your phone anyway. Might as well cough up twenty more bucks to take three-dimensional images than spend hundreds of dollars on a 3D camera that you won’t be using at all times.
The attachment is called the LazeeEye and it works by making use of a laser illuminator hardware add-on and a stereo vision processing app that work together to bring you your 3D images.