Thank you so much @xeon for the detailed description of how to optimize the app! I went through and deleted a ton of non-visible faces. – I only have three objects in the scene at a time, so I don’t think that is the problem.
I am not a dev, so I think jumping into ThreeJS would be a bit too much for me. Would be so cool to have more options to “hybrid” optimize the app for mobile, when a mobile GPU is detected. For instance, turn off shadows, disable lights, change IBL mode, and so on.
– But there is probably a good reason why this is not possible to do already.