Another option is one that I use. I've got a Zoom U-24 that I have a USB-B to USB-C cable that I run to my phone. You don't get any version of Amplitube with it, and, although I haven't tried, I'm pretty certain that you can't record over a jam track like you can with Garage Band on an Apple product. On the upside, the Zoom has 2 inputs, so you can do guitar and vocal or 2 guitars or 2 mics or whatever you want so long as it's limited to the the 2 inputs. I actually got it as a basic interface to use with my laptop, and then realized that, with the right cable I could use it with my phone too.
Until Eric's post, I can honestly say that I didn't realize that iRig had a version for Android.