Currently Being ModeratedDec 31, 2012 8:30 AM (in response to Skittle21)
Are you signed in using the same Apple ID that you used to purchase
on the iPhone4S? You should not have to purchase again for an iDevice,
but would have to purchase to use on a computer running OS X.
Currently Being ModeratedDec 31, 2012 8:32 AM (in response to imobl)
Yep you need the same apple id on both devices. Since you already bought it you can install from purchased.