It runs on any iPad, even 1, since it is sufficient to have iOS 4.3. Even an old iPhone 3G to sleep in a drawer fits the bill provided that it be updated to 4.3, its maximum precisely Os.
Interactivity is done with the sound of the iPad or iPhone (not tested with Android, the tablet Androide the house is too zero children do not want to use it so it is slow, crashes all the time with battery that takes 1 hour, thank you Mickey Magazine)
Hours of game because you have to win virtual eggs (it's like back in the days of tamagochi) washing (virtually) the Furby, giving it room, etc etc etc ... And of course, when one s 'not looking after him for a while he claims .... and calls!
Side autonomy, the first set of batteries is still holding. We'll see. I put rechargeable batteries, after 5 days of intensive play no signs of weakness for now!