I've decided that I just want to go with a pure grocery list app that doesn't have anything extra, so I tested a few apps. I ended up with listonic and we've been using it for over a year now. Maybe it's what you're looking for!

I'm using the opinionated and self-hosted reader Miniflux in combination with a browser plugin for Chrome. This way I see the amount of unread RSS items and I can either click them to open them or just mark them as read. Not sure if it's for everyone, but I like it a lot :) Just figured it should get a mention here.

Seems like the community over at lemmy.world was deleted? At least it returns a 404 for me now :/