Hey it does work on mobile. However, remember visualizations like crosstab, splom are not meant to be displayed in a space constrained area as is. There are multiple way to handle this situation. At this point of time Muze does not changes layout based on space.

The web framework fetches data, does some additional checking on data and schema, process visible code and render it. That is probably the reason you are seeing lag.

Also there are few areas where Muze performance needs to be improved. We are doing a release to address this soon.