We are working with some courses that make a lot of use of the workshop tool, and are thinking of receommending the Mobile app as an interface for our students, but i am unclear if this tool works in this app? is there a list anywhere of what moodle functionality works in the mobile app? I have googled it but no luck.
No, I don't think it does. And as far as I know, it's not even planned to do anytime soon (see https://docs.moodle.org/dev/Moodle_Mobile_Roadmap).
Fantastic thanks, the road map was exactly what i was looking for but couldn't find.