I have iPod touch 4th.
And I'm developing iPhone app with it.
I use ARC. So target iOS is iOS5.0 or later.
I will buy iPhone 4S before releasing the app to test with iPhone 4S.
Is it good idea to buy iPhone 4S and test with it?
And testing with iPod touch 4th and iPhone 4S is enough?
Don't I have to test with iPad or iPhone 4 or 3GS?
(I don't have money to buy them.)
I'm mainly using MPMediaPlayer library and MPMusicPlayer in my app.