• EteSync - Secure Data Sync 1
  • EteSync - Secure Data Sync 2
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  • EteSync - Secure Data Sync 4

EteSync - Secure Data Sync

Secure, end-to-end encrypted, and privacy respecting sync for Android, the desktop and the web. Currently supports calendars, contacts and tasks (using OpenTasks), with more on the way.

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.

Category : Tools

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Reviews (24)

Dam. K. Dec 31, 2021     

Maybe I just wasn't patient enough, but I just needed a simple app for notes sharing and I couldn't make it work with EteSync Notes - e.g. I don't understand how collections in EteSync are related to task lists in EteSync Notes but they are not in sync. Perhaps it is just my ignorance, but I expect a more intuitive workflow for such a simple job.

Kai. I. Nov 30, 2020     

I want to like this app on principle, but it just doesnt work properly for me. Set up and initial sync of contacts seems to work fine, can see in contacts app, but after some time the contacts app just shows an empty address book even tho the sync journal shows the contacts have synced & should be there. I have tried clearing data, reinstalling, same thing happens every time. I use a self hosted server rather than the paid service, so maybe this app just doesnt work so well with custom servers.

A. G. u. Sep 26, 2018     

This is a fantastic app with great developer support! I've been using it without issue for several months now. I've fully transitioned my contacts and calendar!

Rob. Aug 26, 2019     

Great idea. Important privacy/ security tool. BUT respectfully at $24/yr for storage of just contact and calendar data, THE SERVICE IS OVERPRICED. For the cost of a family, one could deploy an entire service on a VPS. The clould storage providers can easily and should provide this or a similar function as part of their core service package. Or perhaps you can partner with them. Good luck.

A. G. u. Feb 3, 2019     

Update2: Fantastic. downloaded the update and loving it. Thanks Update: I did not know that. Thanks for the info and reply. Original: Fantastic app. But how come you havent updated the Fdroid version. We still use the 0.22.6 release

A. G. u. Oct 12, 2018     

Excellent app! Works like a charm. $14/ year is a steal! Sometimes you find an app and developer who actually know what they're doing! Great job!

Nic. S. Oct 29, 2020     

Works very well for me and syncs seamlessly with calendar app Etar. Good job!

Ram. J. Jan 17, 2019     

Phenomenal. I really wish this were more popular. Easy to navigate and serves a vital function.

Jes. B. Jul 19, 2019     

It gave me something ive been looking for for a while , a way to ditch google calender and contacts .

A. G. u. Dec 14, 2021     

Awesome app and service. Been using it for almost three years now, and it works like a charm. Highly recommended!

A. G. u. Mar 9, 2019     

initial setup on a Mac home computer was a little challenging, but once set up it works great

H. A. Dec 7, 2020     

tasks very bugged. sometimes tags, sometimes others. atleast contacts works well.

Ism. A. Jul 27, 2021     

A must on every device. Replace your default calendar / contact app with this.

All. L. Sep 17, 2021     

You would be hard-pressed to find a more responsive developer. Great service.

Ste. A. Aug 21, 2019     

Gives me peace of mind that nobody is peering into my contacts, and dev is super responsive!

Mic. W. I. Dec 1, 2020     

the calendar no longer shows using nine calendar app premium

Ric. Feb 22, 2020     

GDPR - currently I'm protected until December 31st 2020. Will I still be after the is date, as you many have readed how Google is moving UK users to the US. What is the scopes for yourselves. I'm also confused as to why the delevoper address say your in Israel and on the main website it says your based in the UK but servers in Austria.

Sab. H. Sep 28, 2019     

Yes text message history. Edit: Will do it, thanks for your response.

Mol. U. Sep 20, 2021     

This is listed as a free app, but it's only a free trial.

Zac. G. Mar 24, 2020     

Works great. Does exactly what it says.

Aar. J. May 16, 2022     

No longer updated

Ste. F. May 31, 2022     

Frankly, I'm never going to buy your subscription...

SAM. G. Oct 18, 2020     

5stars

A. G. u. May 24, 2018     

Brilliant design, insanely easy to use. Had my Google contacts and calendars ported over and synced back to my phone as the default new contact/event service. This app has done more to help users get off the Googleapplefacebookmicrosoft 'soma' than almost anything I've seen, while still allowing users to maintain an essentially identical workflow. Shalom!