Does anybody now of an Iphone app which can change the pitch? And with this app you can also save the songs to your device or you can send them by email?
(to change the tempo is optional)
I'm willing to pay, but not very much.
I like Capo which can do both pitch and speed. It can be accessed from the "open in" feature so you can use it to grab tunes from email attachment, dropbox, etc. It also has the capability of importing whatever you are currently playing in the Music app or browsing your library.
It currently doesn't let you export the pitch change and I can't tell from your post if you need to go that route.
It hasn't been redesigned for iOS7 yet, so I'm hoping that happens soon.