pretty much just CloudStream tbh

but with cross-device syncing

but with cross-device syncing

For real bro, Cloudstream is the ultimate app whether you want it for TV shows or anime (if you want 4K movies here, you might look at other alternatives).

Aside from account syncing if they could integrate with a Debrid service CS would be the ultimate app for everything (maybe Kodi is the only adversary, only because it is widely available and also has a similar extension feature, but also lacks account syncing and this is a bigger pain in the ass with Kodi).

CS integrates with RD if you use the Streamio extension. You setup RD in Streamio first and then copy over the API url into CS.