Interface and Interaction Design TTMM for Fitbit Clock Face Apps by Albert Salamon TTMM clock face apps present time in a futuristic, abstract and minimal style. The collection of 40 clock faces designed for Fitbit Versa and Fitbit Versa Lite turns smartwatches into unique time machines. All models have color presets and complications settings that are controlled with a tap-to-change on screen feature. Some designs are additionally equipped with a stopwatch, a timer, an alarm or a torch feature. The inspiration for the collection comes from sci-fi movies and from the "Man Machine" and "Computer World" albums, composed by Kraftwerk.