Hi, so I can accept that there is no pinch zoom in 2d graphs. And I can even accept if there is no pinch in 3d graphs as well.
Kind’a unexpected but ok. Because I could use the tool / mode bar right ? just switch between zoom, pan und so forth.
BUUUT on android and iOS each time I switch the mode theview is reset.
You can try it here: 3D Surface Plots | JavaScript | Plotly
I tested it on an android galaxy tab in chrome, iPad safari, iPhone safari and chrome. All the same.
It seems like the plotly developers would really hate mobile devices 
or is there a setting I’m missing ? I mean is nobody besides me interested in having plotly usable on mobile devices ?