# Etar

> Open-source Material Design calendar for Android

Etar is a free, open-source calendar app for Android, built as an enhanced version of the calendar from the Android Open Source Project. It uses Android's calendar storage, so it shows any calendar that another app or account syncs to the phone, and it can also keep an offline calendar that stays on the device. The app offers month, week, day and agenda views in light and dark themes. It is licensed under the GPLv3 and distributed through F-Droid.

- **Category:** Calendar & Scheduling
- **Made by:** The Etar Project
- **Website:** https://github.com/Etar-Group/Etar-Calendar
- **Runs on:** Android
- **Facts last checked:** Oct 9, 2026

## Pricing

Etar is free to use.

- **Pricing model:** Free
- **Free plan:** Free and open source under the GPLv3. The app is installed from F-Droid or built from the source on GitHub, and the project lists no paid version.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Etar | $0 | The complete app, built and signed by F-Droid from the public source code. Version 1.0.57 requires Android 6.0 or newer. |

Read from https://github.com/Etar-Group/Etar-Calendar on Oct 9, 2026. Prices change, so confirm with Etar before buying.

## Key features

- **Month, week, day and agenda views:** Four views in a Material Design interface with dark and light themes. Recent versions let the week start on any day and can stagger overlapping events.
- **Works with any Android calendar provider:** Etar reads Android's calendar storage, so it shows every calendar synced to the phone. You choose which ones are displayed and which one new events go to.
- **Offline calendars:** A calendar can be created that is stored on the phone only and never synced to a server.
- **ICS sharing, import and export:** Calendars can be shared as ICS files and imported or exported from storage, including invitations received by email. The project warns that import has known bugs.
- **Agenda widget:** A home screen widget lists upcoming events in agenda form. The interface is translated into many languages by volunteers.

## Good for

- Android users who want a plain calendar with open source code
- People who sync a self-hosted CalDAV server through DAVx5
- Keeping an offline calendar that stays on the phone

## Worth knowing

- Android only; the F-Droid build of version 1.0.57 requires Android 6.0 or newer.
- No CalDAV client is included. Syncing a calendar with a server needs another app, such as DAVx5.
- The project describes its ICS import as unstable and advises caution if your provider sends invitation emails automatically.
- The Google Play link in the project's README returned a Not Found page on the check date; F-Droid carries the current version.

## Works with

DAVx5, Google Calendar

**Tags:** Calendar, Open source, Works offline, Local-first

## Alternatives

- [Fossify Calendar](https://toolgpa.com/tools/fossify-calendar): Open-source Android calendar with no ads, tracking or account. [Compare](https://toolgpa.com/compare/etar-vs-fossify-calendar)
- [Google Calendar](https://toolgpa.com/tools/google-calendar): Online calendar from Google, free with a personal account. [Compare](https://toolgpa.com/compare/etar-vs-google-calendar)
- [aCalendar](https://toolgpa.com/tools/acalendar): Android calendar with widgets, tasks and one-time upgrades. [Compare](https://toolgpa.com/compare/acalendar-vs-etar)
- [Proton Calendar](https://toolgpa.com/tools/proton-calendar): End-to-end encrypted calendar from the maker of Proton Mail. [Compare](https://toolgpa.com/compare/etar-vs-proton-calendar)
- [Tuta Calendar](https://toolgpa.com/tools/tuta-calendar): End-to-end encrypted calendar bundled with Tuta Mail. [Compare](https://toolgpa.com/compare/etar-vs-tuta-calendar)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://github.com/Etar-Group/Etar-Calendar
- https://raw.githubusercontent.com/Etar-Group/Etar-Calendar/master/README.md
- https://f-droid.org/packages/ws.xsoh.etar/
- https://github.com/Etar-Group/Etar-Calendar/releases

Page: https://toolgpa.com/tools/etar
Listed by ToolGPA (toolgpa.com).