IConnectivity Audio4c
The successor to the Audio4+ supporting two USB-C host devices simultaneously! One port is also 15W powered, so it’s capable of loading a connected iPad or other device. When connecting for instance a Mac to the second port you can stream between devices. It supports class compliant USB audio and MIDI devices. Multiple port configurations can be made through the Auracle X software after which the Audio4c can operate standalone, too. It offers 4x mic / line inputs and 4 outputs. An extra stereo headphones output can also be configured as a separate output, which makes a total of 6 outputs. In addition to the audio connections there are full-sized MIDI in and out connectors. Next to that it offers an 8-port USB-A MIDI hub, to which you can connect a (powered) USB MIDI hub (for instance the Elektron Overhub).
around $400
Very nice interface-in-the-middle for connecting both, my iPad with Loopy Pro and a second device like my laptop or Maschine+ (less stable due to bugs in Native Instruments’ current M+ firmware). Very powerful and compact audio MIDI interface for use with Loopy Pro and multiple controllers or other devices.