DAVdroid has been successfully tested with is a German email provider and focused on privacy. address books, calendars and tasks can be synchronized with DAVdroid.

DAVdroid settings

Choose "Login with email address" and enter your email address and password.

Contact group method: No server-side CardDAV contact group support. Choose "per-contact categories" as contact group method to minimize problems.

Last updated: 06 Feb 2018