If you want to see Amiga on Apple stuff, get UAE for Mac OS X. Apples mobile branch doesn´t allow executing "arbitrary" code from outside of the XCode universe, which means that you can only run software that was approved by Apple. So while the iAmiga-App may offer you to download some games there will be no way whatsoever for you to put your own *.adf in or any other data for that matter - not a single byte - no compiler - no basic - no notepad - no anything.
This is not what I call Amiga.
The C64 Emulator for iPhone is the same crippleware. While it includes "BASIC" there is no SAVE and no LOAD-command and it even lacks some keys you would normally use when programming. So in essence you can´t do much more than "HELLO WORLD" on that.
Apple used to have a great attitude towards developers in 2000, but it all went downhill since iTunes became a store. Now it´s all about the big money and Apple tries to forget that open source helped a great deal, when they propelled themselves from their dark ages at the end of the 1990s.