Free Download DAVx⁵ CalDAV CardDAV WebDAV v4.4.8-gplay | Android | 14.00 MB
Paid version

Compatible with almost every CalDAV/CardDAV servers and services, including Nextcloud, iCloud and Synology!
DAVx is the only all-in-one app for all things CalDAV, CardDAV and WebDAV! It is a fully-featured sync solution for your contacts (CardDAV), calendars (CalDAV) and your tasks (based on VTODO). The app is easy to set up and integrates perfectly with your favorite calendar/contacts app (including default apps). It can also be used seperately, if you either have CalDAV, CardDAV or only Tasks. DAVx can also be used to access your remote WebDAV files.
4.4.8
Minor improvements and bugfixes.
3 new Badges are available! DAVx⁵ is a one-time payment but if you like what we do you can collect "Badges" from the navigation menu to further support us.
System Requirements:
Requirements: Android 7.0+
Home Page–

https://play.google.com/store/apps/details?id=at.bitfire.davdroid