Runkeeper uses FitBit's API to read data. Why won't FitBit return the favor and use Runkeeper's API to read data? It is completely possible to do so. I would love to have my activity data sync to Fitbit without having to go through MyFitnessPal (which does not save all info, like distance).
I have contemplated writing an app to do so but currently do not have the time. Surely some developer can do so??