Trakt is a platform that does many things, but primarily keeps track of TV shows and movies you watch. It integrates with your media center or home theater PC to enable scrobbling, so everything is automatic. Trakt is free to use and powers thousands of apps, most free to use! This includes apps on your phone and even Kodi and a lot of addons written to use in Kodi such as Covenant, Specto, Exodus, and many many others.