用于POC的rails app中的Apple推送通知

I have to develop Apple push notifications service for a rails app for POC purpose. I have gone through the documentation for APNS gem and apns_on_rails gem. Now I am confused that which gem to use. I haven't worked with push notifications in rails and therefore don't want to spoil the application structure. This is the first time that I have to try. So please guide on which gem should be easier to use and implement for as a first timer. Another thing, is it the same for iPhone and iPad ?I have to develop Apple push notifications serv