To keep it synchronized between devices

You could want to have multiple clients in sync.

Also a web service could be fetching 24/7 and perform classification algorithms before serving to the client that will only connect a few times a day.

In my case (not necessarily your case, of course), the cheapest selling-point has become that I already have a browser open for almost everything else, so that's one less thing to install and check in on. But it's also easier to keep up to date reading when individual computers have problems and usually has a nicer API for scripting, if you need that sort of thing.

Try a good one such as Inoreader or NewsBlur, you'll never look back