Recently my daughter wanted to get a looper station/pedal to have some fun with. I wasn't keen on shelling out $2-300 for what she wanted, so I went into research mode, and found an app for the IPad ( Looper HD). It needs some kind of connection kit to accept audio from a regular mic/instrument, or, slap it into the DL
Fortunately, I have one of those solidly built DLs, that run just fine with the IPad docked.
I'm getting a bluetooth footswitch tomorrow, just to give her some flexibility and hands free options.
By the way, the looper hd app is pretty fracking awesome!!!! ( for 4.00 anyway).