Are all iPhone4 apps available for iPhone 5 also? My father in law is considering getting an iPhone 5.  There are some specific apps that he is interested in; are all apps available for iPhone 4 also available for iPhone 5, or do developers have to port them?
All for previous iPhone and iPod touch devices will run, but won't necessarily be optimized for the larger screen. If that's the case, the app will run at the previous (3.5" size) with a black bar above and below the app's content.