Used to describe the wealth of knowledge someone brings to the table, only on the basis of ownership of an iphone
1: "Johnny really knows his way around the city. He must have lived there for years. He knew when all the train schedules on my line, and the best restaurants."
2: "Not really. He's just iphone smart."
1: "Dog, I can't hang with Bill no more. He's always gotta be the one with all the right answers."
2: "Don't sweat it Randy. He's just iphone smart. He'd be quite boring without his device."