Agree with the advice given here.
I’ll just add, I use a CEntrance Mixerface r4r. I saw a deal on eBay and I grabbed it.
It’s arguably overkill for my purposes, but…. The sound quality is very good and it’s basically a sturdy battery powered (or plugged in) audio interface.
A lot of smaller audio interfaces only have one USB port, so it’s either getting power from whatever it’s connected to, or sucking battery if it has one. With this, I can keep it powered and route digital audio simultaneously.
It’s quite handy for routing audio directly to an iOS device over usb with the camera connection adapter.
This lets me record audio on the mixerface while simultaneously routing audio to whatever I’m recording with the iPhone camera.
Maybe zoom and tascam and Sony can also do this, but it just works all the time, with zero fiddling, and that’s huge for me with limited time.