EteSync - Secure Data Sync app icon

EteSync - Secure Data Sync

Secure, private and end-to-end encrypted calendar, contacts and tasks sync

Tengu · com.etesync.syncadapter

Not rated yet 10K+ downloads v2.6.0 11.2 MB Android 5.0+ PEGI 3 · Everyone

Download APK 11.2 MB All versions
  • Signature matches the Google Play version Details

At a glance

Latest version
v2.6.0 (20600)
Updated
Apr 21, 2026 (6 months ago)
APK size
11.2 MB
Requires
Android 5.0+ (API 21)
CPU support
x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category
Tools (app)
Listed since
Dec 21, 2022 (at least)
Permissions
16 (4 sensitive)
Website
etesync.com
Developer contact
[email protected]
Privacy
Developer's privacy policy

About this APK

EteSync - Secure Data Sync is an app by Tengu in the Tools category, listed since at least December 2022. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

It asks for 16 permissions, 4 of them sensitive, including read contacts, read calendar and write calendar. It asks for the same permissions as version 2.5.0.

What's new in v2.6.0

* Remove unused READ_MEDIA_IMAGES permission. * Fix build with latest Android SDKs * Bump target SDK

Description

From the listing uploaded by “appupdater”.

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 =========== 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 ============ 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 ========= 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? =============== 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.

Version history

3 versions are listed, going back to v2.4.4.

v2.6.0 LATEST Apr 21, 2026 11.2 MB TRUSTED v2.5.0 Sep 25, 2025 11.2 MB TRUSTED v2.4.4 May 30, 2024 11.3 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Apr 21, 2026.
  • Certificate issued to “Tengu” This is the certificate of the Google Play version.
  • Same certificate as the 2 other versions checked

Store checks and file details

  • Developer signature verified Apr 21, 2026
  • Validated against Google Play Apr 21, 2026
  • Signed byCN=Tengu, OU=Software, O=Tengu, L=Tel-Aviv, ST=Israel, C=IL
  • Signing certificate (SHA-1)17:81:42:8D:0A:12:E4:A2:0C:C2:28:D8:79:41:00:AF:E4:2A:78:46
  • File MD596a45938a706fb47acf7d68e357a2157
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (16)

EteSync - Secure Data Sync requests 16 permissions, 4 of them sensitive.

Required hardware & features

EteSync - Secure Data Sync APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the EteSync - Secure Data Sync APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 96a45938a706fb47acf7d68e357a2157.

Tags

etesync syncadapter tools

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