There's a slight learning curve, but it's the most organized mobile aggregator I've seen so far. You can customize the following:
• theme
• landing page(s)
• refresh rate
Among other things...
You can separate/group your feeds into local accounts which can be renamed. You can also create subfolders for each local account. I had about four or five local accounts myself:
• Apps (i.e. GitHub Releases)
• Privacy Blogs (i.e. Proton Blog)
• News (i.e. The Guardian)
• Technology/Security (i.e. Superuser)
• Entertainment (i.e. Digital Trends)
Each feed you add has the option to allow Read You to send push notifications so you are alerted of new articles. You can edit how little or how much an article loads upon being tapped on (i.e. visible header images, blurb or full text, internal or external browser tabs, etc.)
This is the best open source option for mobile users, in my opinion.
Despite all this, I now exclusively use Fluent Reader on desktop, as mobile just doesn't do it for me. There is a 'Fluent Lite' for mobile, but it is vastly different from the desktop version and I do not recommend it.
Hope this helps.