DAVx⁵ has been successfully tested with fruux.

fruux is a cross-platform synchronization service, based on the open-source WebDAV/CalDAV/CardDAV PHP library SabreDAV which is developed by fruux.

DAVx⁵ settings

If you have a login ending in, use "Login with email address" with your email address and password / sync password (see below).

If you do not have a login ending in, use this base URL:

User name and password:

  1. either use your fruux login (email address) and password,
  2. or log in at fruux, go to Sync, add a new device, and use the user name and password for this specific device (e.g. user name b123456 and password xyzxyzxyz) – recommend because so you can manage your devices in the fruux Web interface.

Contact group method: groups are separate VCards (not supported in Web app yet)