I’ve been into anime and manga for years now, and I use my sites.google profile to keep track of everything I’ve watched. It’s basically a personal wiki where I list all the shows I’ve finished, with quick notes on the animation quality, story arcs, and my favorite studios like MAPPA and Bones. I also add links to the OP/ED songs I liked. It’s not perfect—sometimes I forget to update it when I binge a new series—but it helps me remember what I’ve seen and share recommendations with friends. No ads, just my collection.