Yeah I've been on AO3. That's not what I'm talking about. I've a few published fan fictions out in the world myself.

That's not what I'm talking about. I'm talking about a way to log what you're reading on FF sites. Like GoodReads or Storygraph. I know that the sites themselves have ways of marking favorites, leaving reviews, etc... but I want to be able to have a list, make a challenge for myself, things like that. Without having to use a spreadsheet.
This is how I feel about podcasts as well. I keep neglecting podcasts and fan fiction because there's no way to keep track of what I've been through unless I go through a LOT of extra work myself. Whereas on GR or SG it is just a matter of a few clicks to update my progress whenever I finish or DNF or want to review something.