Autodesk's Jeff Bartels overviews the BIM 360 Mobile App that allows access and many useful capabilities to all shared BIM 360 Docs project related files.
The BIM 360 Mobile App supports both IOS and Andriod mobile devices and cell phones.
From the Jeff Bartels YouTube Channel.
and the AEC Connection blog.
Jeff shares and maintains a playlist of this on-going series of BIM 360 Docs tutorial videos on his YouTube Channel above.