I use feeder (and apparently there's more than one rss app called feeder), and it's FOSS. I like it a lot. The one feature it doesn't have is any filtering. I wish I could filter some feeds. My local news seems to be like 50% sports, and a lot of sites these days have half of the "articles" they put out just containing a list of Amazon affiliate links. It also doesn't do audio of video, but I don't use it for that

Which platform? I use NetNewsWire on iOS.

Thunderbird has RSS feature AFAIK. KDE's KMail as well.

I am using Feeder by NoNonsenseApps on Android. Open source and no login required (or even possible).

Reeder for Apple platforms is pay-once and lets you sync using your iCloud account

Feedly has an ad-sipported option.

I use freshrss with fivefilters full text rss add on but this is self hosted

If you're on Android, you can look on F-Droid. If you're on Linux, you can look on Flathub, if your DE doesn't already include one by default. Thunderbird also has RSS support to my knowledge.

You can self host with nextcloud. There are also client specific apps as well.

omnivore.app is wicked

Been using free tier Feedly for many years now. It's "good enough". Before that I used Akgregator, which did a pretty decent job for a local app.

Other odd RSS adventures: I played with self-hosted Tiny Tiny RSS for a while, and it is actually pretty awesome. It's automatic filtering and tagging capabilities were amazing. But I got tired of maintaining it. I toyed with NetVibes ages ago -- it is a "dashboard" oriented web site, with RSS support. It worked pretty well actually, but the UI is ... unusual. It used to be free. Maybe still is. I don't know. I found myself using the cleaner and simpler "good enough" Feedly more.

It should be pretty easy to move your RSS feed collection between apps/services as most of them support OPML format import/export. So just go ahead and try stuff and see what you like. (Just check first that it supports OPML import/export.)

You might be interested in this somewhat similar recent thread: lemmy.ml/post/7624818