On iOS, I’ve used Reeder 4 and 5 for many years. It’s great. It’s been renamed to Reeder Classic. Worth every dollar!

The new Reeder is a multi format feed reader. I like the classic RSS only format.

My condolences. /s

Thank you

He mentioned it used http, so the traffic is not encrypted. You can easily monitor http traffic with wireshark.

Syncthing discontinued its android app on the play store.

Give fedora a try. It has everything you would need from a modern “vanilla” linux distro and no user telemetry tracking.