 Memorizer is an iOS app that's kind of part Goodreads, part tracked and part Yelp or Foursquare. It offers to let you track anything. Books, movies, shows, video games, restaurants, recipes, etc. Or it could be a thing you want to do. It's like, you know what? I want to go to that restaurant. I'm going to put that as a memory so I remember what restaurant I want to go to. There is no recommendation algorithm. There's AI all over this thing, but the AI is in your memory to help flesh it out. Recommendations are made for you from people you know, people you're following or groups you're a member of. And there's no ads. The point of Facebook and Twitter and Foursquare was like, share it with the world. What's interesting is this is like, share it with people you want to share it with. You can share it with the public. You can keep it private. You can have a private group where you only invite certain people. And then what's shared in that group is, so there's more of a balance between, yeah, there might be some things you're comfortable like letting the world know, but let's not just assume that you want to always let the world know everything.