well there are lots of app like that tho i havent used this one as ihave ipod but its quite possible.
but i do use simplebaby which i only created to keep track of my baby's habit and it does predict if my baby would be interested in eating sleeping or time to change nappy..
if you have infants let me know if its prediction are good or not..just search for simple baby from tenacious techies.. its feee btw