Bike Calculator Pro is the pro version of the original Bike Calculator iOS app released in 2010. It is a performance calculator. You and your bike are a machine subject to external forces that you - the engine - must overcome in order to move. Bike Calculator estimates how fast youll go, how much time you will take, how much energy you will use and more. This app and our original Bike Calculator app are not gear calculators. The pro version was developed in association with www.bikecalculator.com and incorporates many enhancements including a new segments view and new energy output options for eBikes and kilojoules.