difference between watch history and check ins

@Kedi The best places to start to answer this are the FAQs for the two features at: https://help.imdb.com/article/imdb/new-features-updates/mark-as-watched-faq/GR2SD7Y4LZVNHUVH https://help.imdb.com/article/imdb/track-movies-tv/check-ins-faq/GG59ELYW45FMC7J3 The short answer is that check-ins is the older feature designed more around tracking titles as you watch them and potentially sharing it with friends (for example, mine are at https://www.imdb.com/user/ur1000000/checkins/ and cover all the movies I have watched since we launched the feature in 2011). Whereas “Watched” is the newer feature which we are still developing and it gives people the ability to record that they have already watched a title without rating it and without needing to know when they watched it. At the moment your Watched History is private to you (and, for example, in my case, includes my TV viewing). Whenever your check-in, review, or rate a title, it is automatically added to your Watch History. Hope this helps.