CalendarSync - CalDAV and more

408 reviews
Content rating
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About this app

CalendarSync syncs your appointments with CalDAV, FTP, HTTP, WebDAV servers, Cloudstorage, between calendars on your device, or with local files (stored on the device or e.g. as a mail attachment). A quick overview on the most important features is given below.

Do you want to check out the app for free? You can test the app and all its features without any limitations for two weeks. Simply install its free trial version from

You would like to access the next major update bringing a novel user interface, new features, and guidance/support system?
Then check out the open beta test here:

The app has been successfully tested with more then 50 different CalDAV Servers like Owncloud, Apple iCloud, Zimbra, OSX/iCal Server, eGroupware, GMX, Oracle Beehive, david.fx, Synology NAS, DAViCal, SOGO... You can find an overview here:

⊛Comprehensive support - Questions or suggestions? Simply write us a mail.
⊛Syncs with many different sources - CalDAV, WebDAV, FTP, HTTP, WebCal, Cloudstorage, Local files, Between multiple Device Calendars, Mail attachments and many more. Of course, it also supports encryption and two way sync
⊛Fully supports the current iCalendar standard and partly the older VCalendar standard
⊛Complex configuration? No worries, the app guides you through all the steps
⊛Manage your calendars and create backups with just a few steps manually and even automatically
⊛Flexibility - There are already appointments stored on the device which should be pushed to the server? You need individual sync intervals for each of your calendar data sources? You want to exchange appointments between multiple servers and sources? No worries, this and more is possible!
⊛Designed for high speed calendar synchronization
⊛Seamless integration with your device and your preferred calendar apps
⊛Secure: All the sensitive information are encrypted before they are stored
⊛No secrets, you can - if you wish - always see what is happening and why
⊛Supports complex calendar situations and timezones, servers, and clients
⊛Supports self-signed certificates and client certificate based client\server authentication
⊛Unique solutions for a variety of challenges. You have special requirements? Then the app has likely a solution
⊛New device? Simply export\backup your configuration and import it on the new device
⊛Multilingual: Supports English, German, French, Spanish, Portuguese
If you are interested in translating the app then simply send me a mail

Interesting features for large-scale orders:
⊛Setup and configure your server connections through adb
⊛Licensing for large-scale orders

You can find detailed information to the permissions at our website.

You would like to get assistance? More details on the features or large scale orders are of interest to you? Then please contact us at Be aware, that if you just give us a bad review we can hardly help you as additional information about your configuration is required to provide assistance. We were already able to address tricky and unique scenarios, so simply contact us :)
Updated on
Mar 19, 2023

Data safety

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.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

384 reviews
Tim Boorman
July 25, 2021
I had an issue with getting scheduled synchronisation to work in another CalDAV app, so decided to give CalendarSync a try instead. It works absolutely flawlessly. It is very easy to configure, and provides useful information about the status of each synchronisation attempt. I only wish that I had found CalendarSync first!
6 people found this review helpful
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Tabitha Freeman
November 24, 2020
Edit: it only worked a few hours 2 months ago. I think Annemarie gave up. The email support from Annemarie is great. So, yes, it's a lot to take in when you first install the app and it can be intimidating. It's easier than it appears. Scroll down to Manual & Tipps to start to get the step by step. I wanted my iCal to show up on my android. In options I used CalDav not cloud. That temp apple password goes in step 8. Syncnow manually in your new calend after each change and it's instant.
7 people found this review helpful
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E Vincent
March 28, 2021
Six months in. To using this app and it has made coordinating my schedules so much easier. Handheld to desktop, and vice versa, i can update appointments on the fly and not have to rely on one of the mega-platforms and their whims.
2 people found this review helpful
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What's new

Improved text. Fixed permissions handling for local file access in automatic synchronization. Adaptations for Android 13.
See changelogs for details.