MyFitnessPal and Scosche Rhythm+: Calories burned

Hello - I just got a Scosche Rhythm+ and have been using MyFitnessPal for a while. In the past I've been selecting a canned workout activity, setting the amount of time, and it gives me a calories burned amount. I want to improve the accuracy so I got the Scosche.

The problem is I don't know how to get calories burned. It seems I should just be able to link the Scosche to either iHealth (on my iPhone) or MyFitnessPal directly and have it record my calories burned while wearing the device. For the life of me I can't figure it out. Can someone help? I'm about to return this thing because it just doesn't seem obvious, especially since Scosche says NOT to use their app for the Rhythm+.

Thank you,

Matt