Being a big fan of GK gear I had to check out this app. Glad I did! Simple to use and sounds good. Controls are simple and the tone is good. You can pull songs up in your iTunes library and jam along with them, which makes it great for learning new songs. Also great for practicing without disturbing others. The negative reviews regarding the purchase of an expensive cable are not accurate! Yes you do need an interface cable of some kind. However, there are several fairly inexpensive ones that work including the iRig. I bought a used iRig for $13 and it works just fine with this app!
GJBASSIST about PocketGK - Bass Guitar Amp