Etar - OpenSource Calendar is an open-source (GPL-3.0-only) Android app by Etar-Group. The APK we host is 8.8 MB, it needs Android 6.0 or newer, and it declares 15 permissions.
The file on this page is Etar - OpenSource Calendar 1.0.57, 8.80 MB, and it installs on Android 6.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time ws.xsoh.etar entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.
The manifest inside the APK declares 15 permissions, including access to your contacts. Android asks you to approve those the first time the app needs them.
Its licence is GPL-3.0-only. We took this build from F-Droid, and the source for this exact version is linked below.
We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.
- Version
- 1.0.57
- Size
- 8.80 MB
- Requires Android
- API 23
- Package
- ws.xsoh.etar
- Signature checked on
- Sep 19, 2026
- Where this file came from
- F-Droid
- Licence
- GPL-3.0-only
- Source code
- Source for this version
File SHA-256: dae01d93c8920aa63845868db2190bcc4aa6ff8410b1289de1ce27b1bb89c599
Signing certificate (SHA-256): 3f3176c3ce189c98054ff9e1d32daecf00a41572f4c7bd2b2f80607252ddb06e
We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.
Declared permissions
- GET_ACCOUNTS
- VIBRATE
- READ_CONTACTS
- READ_CALENDAR
- WRITE_CALENDAR
- WAKE_LOCK
- READ_SYNC_SETTINGS
- FOREGROUND_SERVICE
- FOREGROUND_SERVICE_SYSTEM_EXEMPTED
- SCHEDULE_EXACT_ALARM
- REQUEST_IGNORE_BATTERY_OPTIMIZATIONS
- POST_NOTIFICATIONS
- ACCESS_NETWORK_STATE
- RECEIVE_BOOT_COMPLETED
- ws.xsoh.etar.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
More about this app
Our sister site 2113 Apps has a hand-written guide to Etar - OpenSource Calendar, with a breakdown of what its APK contains. Read about Etar - OpenSource Calendar on 2113 Apps
Screenshots
