The Missing Link
If you own an iPhone or any other gizmo that uses the standard TRRS com jack, then this thing belongs on your pedalboard. It's a simple, cheap, and good enough way to get your signal to your mobile gadget and back to the rest of your rig, with the added convenience of a headphone jack for when you don't want to wake the kiddos. The sound quality is just fine, considering it uses an analog connection, and at least there's a volume knob to you can adjust how much gain you send your apps. And to top it off, this thing's built solidly enough to crack macadamia shells. I'm not saying you're going to use this to track your next record or whatever, but if you want to take advantage of all of those cool effects app and looper and whatnot on your phone, you're not going to find a better way to do it for the cash.