Cool like its bigger bro Orphion...

...but if you are sporting an iPhone 5 or screen just as small as I am using and coming from an iPad, you will notice the room limitations. But like everything else, even the larger and more customisable Orphion, you learn that certain sides of your fingers, knuckles, palms etc, will still work to achieve desired sounds with adjustments. My interest is not so heavy on the rhythm/ guitar aspect as much as percussion but for some reason I do get better results with lets say (plucking) on the phone, Also (and this is a device thing) IMO without earphones the iPhone provides a better sound quality. I have major sound problems anyway with my iPad retina so this could just be my own device issue.
I really love both of these apps and you can create some great soundscapes with both without being a musician but by being exposed to the notes and experimenting, a beginner will pick up on notes and achieve at least a rudimentary understanding. Both apps from this developer are so unique plus he does answer emails.
Def well worth the price and much more.

Clurichaun about orphinio