50,000 - 100,000 downloads

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CalDAV-Sync is a CalDAV client for Android to synchronize events and tasks. Due to its implementation as sync adapter it integrates seamlessly with the native calendar app and widgets. Also check out CardDAV-Sync

At present, opening the app from Google Play doesn't work properly. Please open the app from your app menu. We'll upload a fix asap. Sorry for the inconvenience.

To get task support, please install this task app

Since version 0.4 CalDAV-Sync supports read-only sync of webcal ics feeds (via http & https).

Important note for Android 4.1 and Samsung users: To prevent the removal of your accounts on reboot install this app:
Although this issue seems to be fixed in Android 4.2 the workaround is still required on Samsung devices.

Please note that there is a new issue in Android 4.4:
It causes accounts to be removed when an app is updated. Installing the workaround app should help.

This app will create new calendars on your device (one for each calendar on your server account).

Get support and news via Twitter

Please send me an email if you find a bug. Without detailed error description I often can't do anything especially when I can't reproduce it. It's also possible that your server has a bug that CalDAV-Sync can not (yet) tolerate or work around. If you report bugs I can fix them quickly and everyone will benefit.

It is tested and works with
- DAViCal
- SOGo
- Zimbra
- OSX/iCal Server
- eGroupware
- Oracle Beehive
- david.fx
- iCloud
- ownCloud
- many more, see for a list of all servers reported to work

Note to Yahoo!® users: Due to the many issues on Yahoo!'s servers, Yahoo! is no longer officially supported by this app.

Note to users: doesn't support CalDAV. However you should be able to sync your calendar one-way using the Webcal option.

After the installation got to "Settings" > "Accounts & Sync" and create a new Account.

If there is no calendar installed on your device, go to my website and install CalendarProvider.apk and Calendar.apk (FroYo and Gingerbread only)

Once this app reaches version 1.0, I'll make it open source.
See for details on the open source status.


* task support (you'll need this task app
* basic support for self-signed certificates
* supports SNI (needs Android 2.3 and newer)
* supports client certificate authentication (Only Android 4.0 and 4.2 and newer, doesn't work on Android 4.1 yet)
* any number of CalDAV-accounts supported
* automatic calendar discovery (works for most servers)
* auto-provisioning
* supports OAuth2.0 authentication for Google accounts
* syncs multiple alarms
* loads calendar colors from servers if available
* two-way-sync
* sync multiple calendars per account
* full support for time zones
* encrypts passwords in local database
* supports webcal ics feeds (read-only)
* initial support for attachments (Android 4.1 or newer, doesn't work with all calendars apps)
* Dutch, English, French, German, Hebrew, Italian, Polish, Russian translations

Tags: caldavsync apk, caldavsync beta apk, caldav apk, caldavsync, caldavsync.apk, caldav sync apk, caldavsync beta, caldav, caldavsync beta.apk, caldav sync beta.

Recently changed in this version

Please send me an email instead of writing a comment if something does not work.
Also, please check if you need the workaround app (see the app description).

new in 0.4.17

changes for iCloud
minor improvements & fixes
preparations for upcoming stuff

Comments and ratings for CalDAV-Sync
  • (75 stars)

    by cbrace on 04/05/2013

    I configured this Android app for my OwnCloud server and it works flawlessly. Nice work!

  • (75 stars)

    by T Mst on 05/08/2014

    Nice little app. I verified it works without an active Internet connection. The initial sync can really stretch out, but my patience was rewarded. Marten responded to an issue I was having with my local network.

  • (75 stars)

    by Kyle Johnson on 05/08/2014

    Great with OwnCloud

  • (75 stars)

    by Ricardo Garcia on 15/07/2014

    Using it on a Nexus 4 to synchronize my Fastmail calendar. No problems so far.

  • (75 stars)

    by Courtney Ellis on 13/07/2014

    This app does what is promises and the Dev supports it nicely, on the VERY RARE occasions that there are glitches beyond their control.

  • (75 stars)

    by Verity Quinsey on 12/07/2014

    You say email you though no email provided. Paid to find out Yahoo doesn't even work!!

  • (75 stars)

    by Kirill Simin on 04/07/2014

    Well worth it if you have a caldav calendar! Was disconnecting on reset, but installed the jb workaround and boom, works flawlessly!