I use miniflux.app now after switching from tinytinyRSS, which was in fact, not so tiny 😉

Miniflux has a simple, minimal web UI which works nicely from any device. It is kept simple and minimal, which I consider nice but might not be everyone’s cup of tea.

In short: this is small, nice, easy to use and it runs on minimal resources. I’m happily using it for years already. 👍