This app for runners computes distance, pace or time (given two out of the three). The user can enter distance in miles or kilometers, and can enter pace in minutes per mile, minutes per kilometer, miles per hour, or kilometers per hour.
A set of 7 "Quick Picks" aids the user setting commonly run distances. The app also include Boston Marathon qualifying times and paces for respective genders and ages.
The app includes instructions on the flipside view, and link to the support website.