Wow there sure are a lot of these guitar effects apps, and little wonder considering the price of some pedals!
4Pockets Audio has their own, and it is on sale now for only $10. This looks like a great deal, since there is only 1 IAP and it is a mere $4 for a looper.
I compared the features between this and AmpliTube and I am kind of puzzled. Why do these guys both have FTP export? That seems so anachronistic. Don't get me wrong, I love to get down and nerdy with my File Transfer Protocoling, but who is really using this? Why is this a bullet point for both of these apps? JamUp Pro needs to step up and offer FTP and Usenet; export directly to alt.binaries.mp3!
Here is a demo from 4Pockets, featuring Brazilian Guitarist Marcos Klien.