That doesn't seem like too hard of a criterion to fulfill, but well, I'm rather fond of QuiteRSS. It has all of the options for automatic filtering and tagging

That doesn't seem like too hard of a criterion to fulfill, but well, I'm rather fond of QuiteRSS. It has all of the options for automatic filtering and tagging, and its UI is rather configurable, too. It's also open-source. https://quiterss.org/ https://quiterss.org/