At the moment, FitXR does not have an offline mode.

We know this was a popular feature of BoxVR, and it's something we'd like to reintroduce further down the line, but it's not possible right now.

Offline mode worked well on a much smaller platform, but as we've grown and expanded, it simply became too unstable and problematic. For now, our infrastructure has not been designed in a way that allows us to bring this feature back easily - but we would like to see it returned in the future.