Currently the best universal way I've found to watch Anime & read Manga and to keep track of them are the following ways:
Aniyomi
https://github.com/Jays2Kings/tachiyomiJ2K
• Online reading from a variety of sources
• Local reading of downloaded content
• A configurable reader with multiple viewers, reading directions and other settings.
• MyAnimeList, AniList, Kitsu, and Shikimori support
• Categories to organize your library
• Automatic light and dark themes
• Schedule updating your library for new chapters
• Create backups locally to read offline or to your desired cloud service
Read more Here : https://aniyomi.app/