GPS tracking service Strava has got the power, or rather gives the power analysis to premium users, which will include wattage and watts per kilogram.
This week Strava announced that it will now offer a range of power analysis features for its premium members who use power meters. Those premium members have already been able to use Strave for heart rate analysis, but the new “Advanced Power Training Analysis” that provide users with charts of power distribution over a specific ride or given period, and even track “best effort.”
Users can even compare power numbers with friends and other users, to allow for serious power plays.