If you're encountering problems please contact us: support@davx5.com or have a look at our forums: https://www.davx5.com/forums/ instead of down-voting the app so that we can provide support.
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
Feb 4, 2026
Productivity
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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.
Very flaky and unstable, doesn't work with radicale very well. I would refund if I could, as it continuously spams me with auth issues, yet when I go to the app and sync manually, it all works fine. I can't really trust it does its job correctly. Waste of money and time.
bitfire web engineering
December 2, 2025
Hi Tomasz , we have no reports that there would be Auth problems with radicale - and there are uncountable users that use radicale with DAVx5 all the time... So I think it must be something specific. You can look into your server logs at the time where DAVx5 shows the auth message. Maybe you find more information why the auth failed at that time.
Themistocles Mountzouris
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December 8, 2025
Despite the initial step back (lost mails) the support was excellent and the issue (my wrong setting on the phone) was resolved with the help of the support stuff. All is working as supposed to thus the 5 stars for both product and support!
2 people found this review helpful
bitfire web engineering
November 17, 2025
Hello Themistocles. We've answered you 2 times already. Today and 5 days ago. Please check your spam folder.
Will T
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January 20, 2023
My favourite kind of tool: I set it up once, then by and large I never think about it again. It just keeps humming along, syncing my contacts and calendars between Fastmail and my phone. On the rare occasion that I've had a problem, it's always been easy to get support. Once, they fixed a bug within a few hours of my report – at a weekend!
* Improve handling of Contact Photos * Improve WebDAV mount http handling * Update synctools * Various bug fixes and improvments
Badges update: Badges can now be activated by clicking them to buy them again! If you like what we do you can collect "Badges" from the nav menu to further support us. Thank you!! <3