I just use cyclemeter. I tried the mission control app that comes with the S model but it is terribly buggy so I will never use it until they do some updates.
Granted the 2 models get the same top speed, but the S just gets there so much faster and so much easier up the hills.
I have only been riding with my wife so far so can't really give range or speed metrics yet. I will start commuting to work next week so I will get a better idea of what this thing can do. And I am 6 foot and only 150 lbs. btw.