I originally developed a simpler version of HexaFlip for an iPhone app I built called ChainCal where it served as a time-picker interface for setting alarms. Most mobile time-picker widgets are fashioned after a dial, but I reasoned that rotating cubes would serve for a more unique and memorable experience. As we all know, a cube has six (i.e. “hexa”) faces, but when rotating it around a single axis, we only have four to work with (front, top, back, and bottom). Thus if we built a cube interface using CSS alone, our interface would be limited to four options per choice. HexaFlip solves this issue and playfully challenges the user’s expectations by allowing the cube to cycle over a list of any length.