I use Safari to access Discourse forums on the Mac, iPhone, and iPad.
However, there is one feature that I use Fig for, and I love it: I use it to notify me on the iPhone when I get a reply to a post, on days when I’m following discussions closely (like today, both here and in the Obsidian Discourse forum). Most days I just leave those notifications off. Very easy to switch them on and off on a per-forum basis.
While it’s probably pointless to post this here, I would like to clarify that I (a person who posted he uses Fig) am NOT an alter ego of the person who is suspected to use multiple accounts on this forum; I’m just a person on my own.