This app was mentioned in 1 comment, with an average of 1.00 upvote
> How would a user view this on their mobile device?
Install app. Open file.
> Is this something you do/use currently in practice?
I do on occasion. I was using STL Viewer a while ago, because there weren't as many apps. Now there are lots, but you'd have to try them out and see how they work for you.
https://play.google.com/store/apps/details?id=org.opencascade.cadassistant&hl=en
https://play.google.com/store/apps/details?id=org.om3DCAD&hl=en
etc.