Hey there [mention]markgoku5[/mention] , I'm sorry but it seems like PRO won't be coming to iOS anytime soon - This thread here explains a bit more in depth, but basically, iOS doesn't have the right resources to be able to use PRO, and they don't allow third-party developers to submit apps, so there's no plans for it anytime soon.
Sorry for the bad news :( Please, continue to enjoy the game though!