Time Calculator is an iOS app that allows users to perform calculations between hours, minutes, and seconds, and a standard base 10 system. Originally built for our own needs as collegiate track and field athletes, the app was the first of its kind on the iOS app store with such a simple input method. In promoting the app, we targeted coaches and athletes, as it became clear that once one member of a team began to use it, the rest of the team was often quick to follow. The app rapidly spread through track and field and fitness communities and has been downloaded over 160,000 times with no marketing expenditure.
timecalculatorapp.com
