I've been using FitDay since July 14, 2010 (it had been on my computer for over 1 1/2 years). For Christmas I recieved a BodyMedia Fit and was very impressed with how accurate FitDays "calories burned" was. On the day I compared FitDay showed 200 calories less (approximately 9%
than what I actually burned. Not sure what your weight is but the more you weigh, the more calories you burn. The majority of your daily calorie burns comes from maintaining your bodily functions.