I have kept track of the books I’ve read using Goodreads for the past couple of years. Even though I track my books there, I don’t use any of the social features of the site. It’s purely for me. I have a terrible memory so when people ask for book recommendations, or if I try to recall who an author was, I can look it up easily.
I read books on my Kindle, iPhone and on dead trees. I listen to books through Audible. It doesn’t matter how I experience a book. A book is a book.