CalDAV client implementations


CalConnect only provides a list of known implementations of CalDAV clients. Any questions regarding installation instructions, configuration or usage need to be provided by the vendor and please visit the product web site to access them.

supported development



2Do is a task (to-do) manager for iOS that uses CalDAV to store and access the task remotely.

aCal for Android

Open Source/Android

aCal is a CalDAV client for Android which requires a CalDAV server to function.


Open Source/multilanguage

AgenDAV is an open source multilanguage CalDAV web client which features a rich AJAX interface with shared calendars support.


Open source/Linux

The Akonadi framework is responsible for providing applications with a centralized database to store, index and retrieve the user’s personal information in KDE. It supports CalDAV for calendars, tasks and journals.

Apple Calendar: macOS

Included with macOS

Desktop client for macOS that supports CalDAV Access and Scheduling.

Apple Calendar: iOS

Included with iOS 3 and up

Client for iOS that supports CalDAV Access and Scheduling (scheduling added in iOS 4).

Atmail Web Client

Included with Atmail Product PHP/Zend, jQuery

  • A complete Ajax Web Calendar which supports creation of events, tasks, and allow users to schedule work and appointments
  • Daily and weekly calendar view included
  • Intuitive Web interface for creating, moving and resizing scheduled events
  • View shared Calendars, users availability and all the features you’d expect in a groupware solution
  • Support for IE, Firefox, Safari, Chrome and modern browsers
  • Delegation support for shared Calendars

Commercial product only, server- or cloud-based solution, requires minimum 10-user license



BusyCal is a desktop calendar that allows families and small workgroups to easily sync calendars with various CalDAV servers.

Bynari WebDAV Collaborator

Commercial/Outlook plug-in

The WebDAV Collaborator is a powerful plug-in for synchronizing your CalDAV calendar and/or CardDAV contact data to Outlook.

cFos Outlook DAV Add-in

Commercial Outlook/CalDAV Sync

cFos Outlook DAV is an Outlook Add-in to connect to calendar and contact folders on a CalDAV/CardDAV server in the cloud.


CalDAV Sync Adapter

**Open Source Android CalDAV Sync Adapter

CalDAV Sync (Free)” by Gérald ‘gege’ Garcia. An Android sync adapter that enables you to use the (usually pre-installed) default Android calendar app together with a CalDAV server of your choice.



CalDAV-Sync is a CalDAV client for Android to sync events. It is strictly a sync adapter and requires an existing calendar app or component.


Open Source Web Client

CalDavZAP is an open source CalDAV web client



CalendarSync syncs your device with various calendar information sources, e.g. it allows you to sync Android with CalDAV. It also provides many additional features.


Android/Open Source/Commercial

DAVx⁵ (formerly DAVdroid) is a professional open-source synchronization adapter that combines CalDAV and CardDAV into one Android 4.4+ app. It offers two-way sync, integrates seamlessly into the device and is aimed at easy setup and simplicity.


Creative Commons/Drupal

dCaldav is a lightweight, read-only caldav Drupal calendaring client. It comes as a Drupal 6 module with a block included.

DPCalendar GPL/Joomla

DPCalendar is a full responsive Joomla calendar which integrates any CalDAV server seamless into Joomla. You can modify the events right into DPCalendar and the changes will be written back to the CalDAV system (two-way sync).

eM Client with Calendar


Desktop client for Windows (.NET) that supports CalDAV Access.



eTask is a task (to-do) manager for the iPhone that uses CalDAV to store and access the task remotely.

EVO Collaborator for Outlook (ECO)


EVO Collaborator for Outlook (ECO) enables users to take advantage of CardDAV for Contacts and CalDAV for Calendars and Tasks. Synchronization of both Contacts, Calendars and Tasks occurs whenever changes are made. By supporting iCloud, Gmail, fruux, Yahoo! (read-only) and AOL (read-only), users easily import what they have on cloud. Yet, C2C (Cloud to Cloud) feature facilitates duplicating your contacts and calendars from one place to another; O2C (Outlook to Cloud) feature gives you an option saving your data elsewhere on the Cloud.


Open source/Linux

Evolution provides integrated mail, address book and calendaring functionality to users of the GNOME desktop.


Commercial Outlook CalDAV/CardDAV Sync

gSyncit V4.2 offers CalDAV calendar/task sync and CardDAV sync for Outlook, in addition to a number of other features.


Outlook for Windows Sync Plugin

iCal4OL is a program for smart importing with sync, exporting and subscribing (as Remote Calendars) ICAL files (*.ics) and feeds in Outlook 2000-2010.


Open Source CalDAV/CardDAV web client

InfCloud is an open source CalDAV/CardDAV web client (integrated version of CalDavZAP and CardDavMATE). Demo at


JavaScript CalDAV Client

A CalDAV Client for modern( ca. 2011) web browsers using a bit of html5 and a bunch of css3. Patches, bug reports and translations of the en-us.js file are welcome, send to

Kalendi Android


Kalendi Android is a calendar application for Android that supports multiple CalDAV servers. Free API package available.


Open Source/Python

khal is a CLI (console/terminal) calendar application build around CalDAV.

Mozilla Calendar Project: Lightning

Open Source/Cross-platform

Desktop client (Sunbird) and Thunderbird plugin (Lightning) that supports CalDAV Access and Scheduling.

Outlook CalDAV Synchronizer

Open Source/Outlook

Outlook Plugin, which synchronizes events between Outlook and CalDAV servers. Supported Outlook versions are 2013 and 2010.


Commercial Outlook/CalDAV Sync

SurGATE Outlook Sync Client provides two-way calendar and contacts sync between Outlook and CalDAV/CardDAV Servers.

Postbox with Lightning

Commercial/macOS & Windows

Postbox is a Mozilla-based email application that now supports the Mozilla Lightning extension to enable access to calendars directly within the application, including CalDAV servers.



Rainlendar runs on Wndows, macOS and Linux and is available in both a free Lite and purchased Pro version with more functionality including CalDAV support.

SOHO Organizer


Application to manage both personal and shared calendars.


Open Source/Java

Webical is a web application to view and edit multiple iCalendars and has a CalDAV plugin. Its features include progressive enhancement, a plugin framework that can be used to enhance the GUI and the back end providers, pluggable authentication, and i18n.

unsupported development


Open Source/Cross-platform

Desktop client that includes CalDAV Access support.

Not supported since 2009

The chandler server has recently been started to be supported again by 1&1 and moved to their GitHub repository. See the Server Implementations page for that.

kCalDAV for Kontact

Open Source/Linux

Plugin that provides CalDAV support for Kontact.

This project is no longer being maintained. The source code is kept here for historical purposes.


Open Source/Cross-platform

Desktop client that supports CalDAV Access and Scheduling.

Not supported since 2005



SimpleCal is a Windows calendar application built on top of the CalDAV standard. It currently supports Windows Vista, Windows 7, and Windows 8.1. Visit for more information.

Status uncertain; appears to have been abandoned since 2013


Open Source/Linux & Windows

Spicebird is a collaboration application built on top of various other open source software, mainly the Mozilla Platform and Thunderbird. CalDAV support is included.

Status uncertain; appears to have been abandoned since 2009


Open Source/Java

TaskCal Internet standards based human task management and process interaction. TaskCal is an iCalendar wrapper to the jBPM process manager, providing standards based calendar agent access to an actors tasks via email (iMIP), HTTP (.ics) and CalDAV.

Status uncertain; appears to have been abandoned since 2014

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