The whole thing is designed to be super-simple to understand and operate, and is battery-operated and fully portable, weighing just 780 grams (1.7 lb) and measuring 17.2 x 11.5 x 14.8 cm (6.8 x 4.5 x 5.8 inches).

It consists of three parts: a reservoir, which holds 400 cubic cm of printing volume; 100-gram bottles of coloured photopolymer resin to build your objects with; and a mechanised lid, under which the build plate and control electronics are tightly arranged.

So how do you use it? First, you have to load a schematic of your object into the OLO mobile app (available for iOS, Android, and Windows) and then fit your smartphone into the base under the reservoir. A piece of polarised glass is installed into the base, which your phone’s touchscreen will be facing when set in place. Even the large iPhone 6S+ will apparently fit.

Then comes the printing part, which Drew Prindle explains over at Digital Trends: http://www.sciencealert.com/this-99-device-transforms-any-smartphone-into-a-3d-printer