I am about your age too, and I'm happy that tracking apps exist now because it means I no longer pick up an interesting looking book at a library or used bookstore and get a few dozen pages in before I realize I read it already. I guess if you purchase and keep every book you read it's easier to keep track of but I don't have the space or money for that.

I use Goodreads just to track what I read already, and sometimes add books to my to read list when someone makes a recommendation or I read a review. I ignore all the social and recommendation parts of it.