---
type: entity
title: DAVx5
tags: [android, synchronization, caldav, carddav, app]
related: [groupware, android, caldav, carddav, f-droid]
created: 2026-07-01
updated: 2026-07-01
sources: ["output/rz_uni_greifswald_de_dienste_webdienste_groupware_sync_android.md"]
---

# DAVx5

**DAVx5** is a synchronization application recommended by the URZ (and specifically the [[universitatsrechenzentrum-urz]]) for Android devices to bridge the gap in native support for [[caldav]] and [[carddav]] protocols and to access university Groupware services.

## Functionality
It acts as a bridge between the Android OS and servers using the [[caldav]] and [[carddav]] protocols, allowing users to synchronize:
- **Calendars** via the CalDAV protocol.
- **Contacts/Address Books** via the CardDAV protocol.

## Distribution and Availability
The app is available through two primary channels:
- **Google Play Store**: Paid version.
- **F-Droid**: Free version.

## URZ / University Configuration Requirements
When configuring DAVx5 for the Universität Greifswald Groupware service, users must adhere to the following settings:

- **Base URL**: Use `https://groupware.uni-greifswald.de`.
- **Preemptive Authentication**: This setting must be unchecked/disabled.
- **Account Naming**: The account name must be set to the user's **primary email address**. This ensures correct metadata (organizer) attribution for calendar events within the Groupware system.