Hi Averdier,
I like the idea of creating the app (and garden) in a VR space and using a virtual assistant with voice commands. I have played around with this idea a little using Unity (see prior post: Connecting Simulated AI/VR Garden to Raspberry PI ).
What tools are you using to create VR Space? If you are using Unity it may be straight-forward to build-deploy as AR app on iPhone. At some point it will be possible to use Mira Prism headset with an Android app as well, not sure what the timeline is for that.
Cheers,
Mike