Mine is Next Episode App and I frickin love it. You can track each season/episode of shows you're watching, and old shows, flag new shows to keep an eye on. It even has a movie piece and will recommend shows.
I use it on Android and did spend a couple of bucks to be ad free (less than 5) but it is well worth it!
https://play.google.com/store/apps/details?id=net.nextepisode.android
Website is https://next-episode.net/
I had this one with a previous phone and it was nice Bandolier Emma Crossbody Phone Case and Wallet - Black Leather with Gold Detail - for iPhone SE / 8, 7, 6 https://www.amazon.com/dp/B07DV62WYK/ref=cm_sw_r_cp_api_glt_fabc_NH2YBBWWH2FHQ0CN05D7