A share link for a file in BIM 360 Docs opens up in a normal browser directly to the viewer module for the file.
However, if you click on that link from an iPad and you have the BIM 360 app installed, it opens the BIM 360 app, but navigates you to the folder where the file is contained, not to the actual file.
It would be nice for the BIM 360 App on the iPad to directly open the file viewer for that file.