Reminds me a bit of UAD and the OX. Back then, I got my hands dirty, used tcpdump on my router, to reverse-engineer their websocket communication and write a Qt app for Linux. Frankly, I wouldn't do that again, because it can easily turn into a moving target, if the maker of the devices decides to change the API or add encryption.
You have to be aware, that it requires (wo)manpower at Kemper to maintain it properly and deal with all the hassle of Android app development. Perhaps they eventually give in if there's a high enough demand. However, both, Rig Manager and the iOS app are lacking certain very important features, like pedal and switch assignments and frequently crash on me. That software just doesn't feel complete/stable to me. ...a bit like they're not really throwing much dev resources at it.
EDIT: Perhaps OSC would be an option.