If you don't want an app/want to control your data, you can use other services that can be self-hosted service too (miniflux, ttrss, etc.). It will handle syncing and often has a fine web client, or else compatible with most RSS readers through e.g. Fever API. Miniflux has hosting they provide if you don't want to self-host. Been using miniflux for a few weeks and enjoying it, but I know ttrss and others are popular too.