Played it on my younger brothers ipod and my older brothers work ipad.
It is very good, but so prone to crashing it's almost unplayable. However I'm really hoping that's to do with the hardware.
By the way, it's better on a tablet than a phone. It benefits from a bigger screen given its detail and the size of some of its buttons.
Oh, and when sending people out to explore bear in mind that they take almost the same amount of time to return.
So if you send a person out for 6 hours he'll take maybe 4 more to return with no way to rush him.