I have to admit, I am in a state of shock right now. For some reason today I decided to try to get the rt-xr Viewer software working on iOS. After all, it worked fine on Windows desktop, UWP (Windows MR), macOS and Android so why not? However, I expected endless trouble with the Manifold library but, as it turned out, getting it to work on iOS was trivial. I guess Unity and .NET magic came together so I didn’t have to do too much work once again. In fact, the hardest part was working out how to sort out microphone permission and that wasn’t too hard – this thread certainly helped with that. Avatar pose sharing, audio sharing, proxy objects, video and sensor feeds all work perfectly.
The nice thing now is that most (if not all) of the further development is intrinsically multi-platform.