I use a self hosted instance of tiny tiny rss (tt-rss) for subscriptions and Omnivore for reading. Omnivore is open source with no data collection. The iOS app

I use a self hosted instance of tiny tiny rss (tt-rss) for subscriptions and Omnivore for reading. Omnivore is open source with no data collection. The iOS app is very good with integration for saving items from the firefox web browser. The web app works well on the Linux desktop with the Firefox addon for saving articles.