Ipod/Ipad Recording
As requested by our great Instructor Todd Simpson, we gather here some information regarging recording guitar & backing tracks using IOS devices (iPhone, iPad), a feature demanded by a growing amount of people these days.
Let's hear what Todd has to say first:
Todd here 
Your iphone should work fine
One way is probably to use GARAGE BAND on the iphone which costs $5 (five dollars U.S.) it will let you pull in the backing track, and record your track, then export your track only and export your track with the backing. Just mute the backing track when exporting to get a version with just your solo 
You could also use the FREE APP called MTSR for iphone which does multi track recording for iphone Fewer features but FREE!!
Further info and original board discussion about this matter to be found HERE
Hope this helps ;)
Todd
Some extra input provided by GMCer Benetom:
Positive Grid JamUp/Bias, Audiobus and Garageband goes metal.
Amplitube guitar multieffect app.
ToneStack guitar multieffect app.
Mark Holcomb of Periphery on JamUp and BIAS by Positive Grid
Jordantron/SampleWiz + ToneStack FX recorded directly to Jammit
Dream Theater cover
