EteSync - Secure Data Sync

4.3
282 reviews
10K+
Downloads
Content rating
Everyone
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About this app

Secure, end-to-end encrypted, and privacy respecting sync for your contacts, calendars, and tasks (using Tasks.org and OpenTasks). For notes, please use the EteSync Notes application.

In order to use this application you need to have an account with EteSync (paid hosting), or run your own instance (free and open source). Check out https://www.etesync.com/ for more information.


Easy to Use
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EteSync is very easy to use. It seamlessly integrates with Android so you won't even notice you are using it. Security doesn't always have to come at a cost.

Secure & Open
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Thanks to zero-knowledge end-to-end encryption, not even we can see your data. Don't believe us? You shouldn't, just verify yourself, both the client and server are open source.

Full History
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A full history of your data is saved in an encrypted tamper-proof journal which means you can review, replay and revert any changes you have made at any point in time.


How does it work?
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EteSync integrates seamlessly with your existing apps. All you need to do is sign up (or run your own instance), install the app, and enter your password. After that, you will be able to save your contacts, calendar events and tasks to EteSync using your existing Android apps, and EteSync will transparently encrypt your data and update the change journal in the background. More security, same work-flow.
Updated on
Mar 1, 2024

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
This app may collect these data types
Personal info, Calendar, and Contacts
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.3
277 reviews
A Google user
January 11, 2019
Excellent product and service. Well worth supporting the developer's work by subscribing. I tried rolling my own self-hosted caldav/carddav service using a couple different FOSS applications, but each had quirks I didn't want to deal with. EteSync has worked flawlessly for me, and eliminated the time I'd have to spend maintaining more server-side apps. Thanks for the great product!
47 people found this review helpful
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Caballero Martinez
May 8, 2024
Broken. Successfully used it for the two free weeks. After that I subscribed and paid for a yearly plan, but my account continued to be inactive and unpaid for over a week? Contacted support via email, they say payment is still broken???? Had to move all my data back out of etesync, what a waste of time :(
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Mykola Grybyk
May 7, 2024
I love the app. It works like a charm. I'm using it as an alternative to google calendar and contacts. Dear developers, thank you so much. I wish you all the best, please keep the product running! Cheers!
6 people found this review helpful
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What's new

* Fix error when importing from file in Android 13+