you haven't tried it by now: Square Cash is the easiest money transferring app on the market. I'd go as far as to say 1: that they are going to give paypal trouble, 2: that banks are going to be forced to streamline their mobile experience, and 3: even if they did, I would probably still use Square Cash. The app is as easy to use as it is nicely designed, give it a try.
Check it out here or download it in the itunes store.