yeah i was using cardiotrainer for a while. awesome app that gives lots of good info...for free! the only thing i don't like is that you don't have instant access to the info unless you keep your phone mounted. personally, i don't like mount devices that large on the stem/bars/frame. i was just gifted a garmin edge 500, which does pretty much all i wanted while also being considerably smaller than my android phone and also is much easier to mount and use while riding. still, i'll use my phone for mapping routes while i'm out there.