This is one of my favorite apps to use for my jellyfin server and other network storage devices. it even works with an old “portable wifi storage” device that i have. it can grab the metadata itself, or use the existing metadata if you chose to. It has built in upscaling, can sync media progression with the server, and you can download subtitles for your media from within the app!!!(if found)
They give you most of the features for free, then have some more advanced ones in their paid subscription(Yearly, Monthly, or Lifetime)