The PA app is pretty heavy, for a mobile game. Even if they let you play it, your phone is likely to overheat and the battery empty out almost instantly. Tablets are better suited to handle heavy apps, because by design they have more surface to release heat and the batteries are much, much bigger. There are few other reasons why it's not allowed on phones, like the fact they don't want to support a billion different platforms, but as someone who plays it on iPad, I can honestly tell you that I would not want to attempt to run it on my phone.