Be careful with those, they can interfere/kill your or your neighbors DSL connection. Terrible to diagnose these.
Antennapod supports syncing with podder.net and gpoddersync
Have you tried https://github.com/jeena/fxsync-docker? It is a docker compose for selfhosting the new Firefox sync server rewritten in Rust.
Credits: https://lemmy.world/post/5839867
Keepass on phone, desktop and tablet. Sync serverless via Syncthing.
I also use openScale from F-Droid, in combination with this Bluetooth scale:
https://sanitas-online.de/de/p/sbf-70-bluetooth-glas-diagnosewaage/