Do you know the "Future Histories" podcast? It aims to expand our concept of the future by discussing a broad range of themes like alternatives to capitalism, degrowth, commons, cybernetics and much more. In every episode the host Jan Groos talks to interesting guests, who are activists, scholars or experts on their fields. I linked one of the recent episodes but I would recommend to check them all out. Sadly many episode are in german, but you can find the English episodes by searching for "Future Histories International".
Thunder is my favourite. It's an android app and I got it from F-Droid (Izzy on Droids Repo). Clean and customizable interface, convenient features like for example multi account support. I would recommend it!