Here is the link and summary of what this thing does:
So, whatever helps you on getting your body into top shape (and hot for those of us who have husbands ;-) ) to glorify Yeshua then let's go for it!
And if you aren't an iPhone person, then we just wait it out because soon they are coming up with the same application in the form of a website! VERY COOL!
(To get it on iPhone, it costs $1.99 for the app.)