I have an opportunity to do some 3D scanning for an individual this week, but I don't own a 3D scanner and so I've been looking around at iphone/ipad apps or software solutions. I've come across trnio.com, but I'm a little confused. It exports as a PLY file, which I'm assuming Meshmixer or some other program can convert into an STL file for printing? Has anyone ever used this software before? Do you think it would produce an STL file that would print nicely? Or does anyone know of another way I can do scanning without buying a hardware device? If I have to buy a device, has anyone used the Occipital Structure Sensor, with itseez3d app?