I have ordered an i pad mini4 but I'm reading conflicting reports stating that I can or cannot use star apps like Sky Safari. The i pad 4 is a wifi only model and I'd be using it without a wifi signal, i.e. out in the field away from civilisation. My guess is this won't work and I'll have to cancel the order but some web pages suggest the opposite. Can anyone please set me straight. Many thanks in advance.