Whatever the linguistic details, one of the main roles of RSS is to supply directly to you a steady stream of updates from a website. Every new article published on that site is served up in a list that can be interpreted by an RSS reader.
Unfortunately, RSS is no longer how most of us consume “content.” (Google famously killed its beloved Google Reader more than a decade ago.) It’s now the norm to check social media or the front pages of many different sites to see what’s new. But I think RSS still has a place in your life: Especially for those who don’t want to miss anything or have algorithms choosing what they read, it remains one of the best ways to navigate the internet. Here’s a primer on what RSS can (still!) do for you, and how to get started with it, even in this late era of online existence.
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Feeder is a FOSS local RSS client for Android, there’s no options to create an account, so I don’t know what you’re on about.
If you’re looking for a good desktop RSS client, I use Fluent Reader which is also local, FOSS, and doesn’t need any accounts. It does use Electron, which I know ticks some people off but IMO an RSS client is a pretty acceptable use-case for it.