Not..exactly for guitar

The app is well designed (common with Apple), and works well for everything EXCEPT electric bass and guitar. The only way to connect it directly to GarageBand is to buy proprietary hardware, such as an instrument-to-lightning adapter, which of course costs more than the amp-to-3.5 mm cable I bought to use my guitar with GarageBand for Mac. (Which works wonders.) if you dont have one of these specialty adapters or cables, youre outta luck.

The Goth Neko about GarageBand, v2.2.1