OpenSync App

OpenSync is a Open Source CalDAV/CardDAV (Contacts and Calendars) Sync for Android. it has been tested with Nextcloud Server. its integrates natively in Android calendar/contact apps. It's a fork from open source project DavDroid

Now DavDroid is know as : DAVx5 and one can find new source code at

OpenSync was forked from DavDroid Version

OpenSync Source code is at

Its licensed under the GPLv3 License. same as davdroid.

Its mine personal attempt to make a Android App for CalDAV/CardDAV for NextCloud (Server which I use), again a Open Source Software. It's still Beta from my side as its some basic changes to original code of DavDroid. Would try to find time to add more into this app. This is no way to replace original DavDroid app or compete with them.

If you love this app, I would recommend you to support DAVdroid (the original app), please consider donating to DAVdroid now DAVx5 or purchasing it on playstore.

Parts of OpenSync have been outsourced into these libraries (based on original davdroid):


Extra libraries are used (based on orginal davdroid) :