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DAVx⁵ 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. DAVx⁵ can also be used to access your remote WebDAV files.
Want to keep track of tasks, notes and journals? Try jtxBoard: https://play.google.com/store/apps/details?id=at.techbee.jtx DAVx⁵ can synchronize everything from jtx Board with your own server!
Compatible with almost every CalDAV/CardDAV servers and services, including Nextcloud, iCloud and Synology!
After installing, you can add a DAVx⁵ account for CalDAV and CardDAV from within the app. See https://www.davx5.com/tested-with/ for help. For more information, please see the manual: https://www.davx5.com/manual/, the FAQ: https://www.davx5.com/faq/ and our forums: https://www.davx5.com/forums/
Key features:
⊛ Sync your Calendars (CalDAV) and address-books (CardDAV) and Tasks (VTODO via CalDAV) in a single app ⊛ Two-way synchronization (server ↔ client) ⊛ Access your WebDAV files and work with remote storages — seamlessly just as they would be local on the device ⊛ Flawless integration with your device and favorite apps ⊛ Easy setup (resource auto-detection, support for self-signed certificates, authentication by client certificates) ⊛ Fast algorithms for high performance (CTag/ETag, limit sync time range for past events, multi-threaded sync) ⊛ Optimized for phones and tablets. Backward compatibility for old Android versions. ⊛ Management options within the app (Create and Delete new calendars, address books and to-do lists*) ⊛ Super-secure and we respect your privacy! ⊛ Absolutely no ads and no tracking. ⊛ GDPR compliant. ⊛ DAVx⁵ is completely open source
* depends on server implementation / may be not supported by all servers
Important compatibility notes
Attention: DAVx⁵ must not be moved to the SD card! This will cause strange behaviour, including account and data loss.
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 / Thunderbird / WebDAV storage etc. on your computer
⊛ … and many others: https://www.davx5.com/tested-with/
Also available as a separate business version with Enterprise features like mass-deployment and pre-configurable settings: https://www.davx5.com/organizations/managed-davx5
Privacy Policy: Please find out how we handle your data: https://www.davx5.com/privacy/
Updated on
Aug 4, 2025
Productivity
Data safety
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
Worth every penny! One of the few apps in my life where I spent the money, and in less than 10 minutes was fully happy with my purchase. I've used it for a few weeks now and it works perfectly. Syncs the calendar and contacts from my mail server (which, despite it having an app, does not sync calender and contacts to my phone) right in to the calendar and contacts app in my device. Exactly what I needed.
24 people found this review helpful
Zero x
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July 16, 2025
Basically perfect, would love it if the notification that the server couldn't be reached was bundled per server, instead of a notification per calendar subscription. otherwise great! :)
1 person found this review helpful
Christopher Winchell
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July 13, 2025
So far, so good! I am using this app to sync my Vivaldi webmail calendar and contacts to my Galaxy phone. I consulted the DAVx5 "Tested Services" website for explicit instructions for setting up the syncing, and all is working very well. Many thanks to the bitfire crew!