Dig Amazon Prime Music on your iPhone, but would rather not go sifting through songs or playlists when you just want to start streaming? You don't have to after today. At long last, Amazon has updated Prime Music's iOS app to bring in Prime Stations, ad-free radio feeds based on artists and genres, much like what you'd get if you paid for Pandora or Spotify (minus their larger catalogs, mind you). And if you do want more control, there are also personalized recommendations that suggest playlists and tracks based on what you've listened to in the past. While this probably won't get you to switch to Amazon's music service if you weren't already a fan, it will give you one more reason to keep that Prime subscription going.