DAVx⁵ (formerly DAVdroid) is the only all-in-one synchronization 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
Compatible with almost every CalDAV/CardDAV servers and services, including Nextcloud, iCloud and Synology!
After installing, you can add a DAVx⁵ account from within the app. See https://www.davdroid.com/tested-with/ for help. For more information, please see the FAQ: https://www.davdroid.com/faq/ and our forums: https://davdroid.bitfire.at/forums/
Get the best out of this app …
⊛ … when using with your own DAV server (Radicale, DAViCal, SabreDAV, Baikal, …) and HTTPS – so you own and control all your data while having the comfort of synchronization between various devices. Or use a hosted DAV service you trust or the one of your company.
⊛ … and combine it with Evolution / Lightning / etc. on your laptop / PC
Why is it secure?
⊛ Source code is available (see homepage)
⊛ No need for giving your contacts/calendars to Facebook, Google, etc. Use your own server (or a trusted one)!
⊛ TLS is recommended to protected your communication so synchronization is secure even when using open Wi-Fi networks.
Successfully tested with:
⊛ Apple's Calendar and Contacts Server
⊛ Apple iCloud
⊛ Mac OS X Server
⊛ Kerio Connect
⊛ Synology DSM
⊛ Yahoo (calendars only)
⊛ Zimbra Server (Community Edition)
DAVdroid must not be moved to the SD card! This will cause strange behavior, including account and data loss.