Yeah I’ve tried that with my webdav mount coz its the obvious thing to do.

Problem is local notes are exposed to other apps and unencrypted.

Apps like neutrinote can protect notes in their app sandbox and create a backup mirror in location of choice e.g. a webdav Mount that happens to be behind mtls.

Syncthing does not offer mtls.

Thanks for the info. Will look in to that approach too.

Mtls requires that the android client device has a certificate installed that matches the one installed on the server in order to access it.

Vaultwarden behind mutual tls and reverse proxy and https://github.com/oguzhane/bitwarden-mobile until https://github.com/bitwarden/mobile/pull/2629 is merged

But honestly all services you mentioned are worthy.

Anything that fits your needs imao

RPI4/400 is perfectly capable as a little home server. All it needs is a good SD card.

Owntracks,photoprism,monocker,brave go m-sync,libre photos,wallabag,radicals e,Baikal,Firefox sync,Joplin web,webdav server,jellyfin,vaultwarden,wireguard