Designers Albert Salamon and Michal Zylinsk have developed ‘TTMM’, a collection of interchangable smartwatch interfaces for timepieces with black and white 144×168 pixel screens such as the pebble, kreyos, hotwatch and wellograph. Each app is available in 20 different variations and in black or white; the styles run from a business aesthetic with TTMMchart to a sci-fi theme with ‘TTMinus’. Users are able to upload, install and change the face of their clock whenever they’d like, directly using the pebble smartwatch application.