I suggest TinyTinyRSS[0] (ttrss), a good and free rss-reader. It's open-source, so you can host it yourself (a short tutorial is on my blog[1]).
Since it's a web-application, you can run it on any device that has a browser, ttrss even has an offical android client[2].
There's even a hoster that provides ttrss as a service [3].
I've been running it for years and heartily recommend it. Both the web and android clients are very robust. The killer feature for me is the ability to share arbitrary content to your own public feed provided by the ttrss instance. (https://tt-rss.org/gitlab/fox/tt-rss/wikis/ShareAnything)
I'd recommend using Postgres as opposed to Mysql, as that is what author specifically recommends (mysql support has been a bit subpar)
Another endorsement for ttrss. I've been running it since 2005, albeit I forked my version years ago after finding the original author a little abrasive to deal with re: patches.
There's even a hoster that provides ttrss as a service [3].
[0] https://tt-rss.org
[1] https://www.zufallsheld.de/2013/11/03/tiny-tiny-rss-centos-n...
[2] https://tt-rss.org/gitlab/fox/tt-rss-android
[3] https://tinytinyrss-servers.com/