Originally Posted by davester

For short rides that may be OK, but if you're frequently riding 50-milers, centuries, etc (something I do every week) this doesn't work. You need extra calories to keep from bonking.

I do agree that the various apps are all over the map regarding calories burned. A major issue is that some include your baseline calorie expenditure (i.e. the calories burned just to keep you alive) rather than the excess calorie expenditure due to exercise. The LoseIt! app's exercise calorie estimator seems pretty conservative. I'm especially surprised at the low calorie count it gives for sexual activities.