Etar is a material designed open source calendar, for everyone!
About this app
Features: - Month view. - Week, day and agenda view. - Uses Android calendar storage to show all synchronized calendars. - Material Design. - Dark and light theme. - Support offline calendar. - Agenda widget. - Support sharing calendars via ICS and the ability to import/export from SD card. - Multilingual UI.
Bugs and feedback: https://github.com/Etar-Group/Etar-Calendar/issues Source code: https://github.com/Etar-Group/Etar-Calendar
Licensed under GPL-3.0-only.
What's New in v1.0.56
Imported from the F-Droid repository index.
- - Use SAF to avoid external storage permissions
- - Prevent Etar from overriding external calendar sync settings
- - Add missing channel_ID
- - Bugfixes
Version history
Jun 9, 2026 · 8.4 MB · Android API 23–36 · code 56
Imported from the F-Droid repository index.
- - Use SAF to avoid external storage permissions
- - Prevent Etar from overriding external calendar sync settings
- - Add missing channel_ID
- - Bugfixes
SHA-256 a7f9bc86bb01115682c52fd0b363239fb5e4d639b0f9ebebd5de2032ade13aec
Apr 21, 2026 · 8.4 MB · Android API 23–36 · code 55
Imported from the F-Droid repository index.
- - Revert Load events when scrolling in month view
- - Revert Add stacked events
- - Bugfixes
SHA-256 507ff8a1a02cfcdbeca1fedcb1d90f162ca315a1fb5fc40d52f3504e1099d73c
Apr 19, 2026 · 8.4 MB · Android API 23–36 · code 54
Imported from the F-Droid repository index.
- - Fix UTC bug in goto
- - Load events when scrolling in month view
- - Add stacked events
- - Add WRITE_SYNC_SETTINGS permission to prevent calendar duplication on sync toggle
- - Bugfixes
SHA-256 c2b3a3485199aca9fe15baf17a632049ac9a74c812d6fdb470ff076f7de96970
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be ws.xsoh.etar is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.0.55 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Etar - OpenSource Calendar first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Etar - OpenSource Calendar, and a listing is removed when the evidence for it stops holding up.
Get Etar - OpenSource Calendar
Every source we list for ws.xsoh.etar is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
a7f9bc86bb01115682c52fd0b363239fb5e4d639b0f9ebebd5de2032ade13aec
Signing certificate
3f3176c3ce189c98054ff9e1d32daecf00a41572f4c7bd2b2f80607252ddb06e
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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