# Etar (open-source calendar and contacts app)

> Etar is a free, open-source calendar and contacts app for Android. Etar is a material designed open source calendar, for everyone. It has 2,608 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.

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: Source code:

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/Etar-Group/Etar-Calendar |
| Platforms | Android |
| Built with | Java |
| GitHub stars | 2,608 |
| License | GPL-3.0-only (open source) |
| F-Droid | https://f-droid.org/packages/ws.xsoh.etar/ (package ws.xsoh.etar) |
| F-Droid anti-features | none flagged |
| Google Play | https://play.google.com/store/apps/details?id=ws.xsoh.etar |
| App Store | not linked |
| Website | none listed |
| Official | no |
| Category | Calendar & contacts |
| Latest release | v1.0.57 (Jul 27, 2026) |
| Last commit | Oct 6, 2026 |

F-Droid builds its apps from source and flags anti-features: https://f-droid.org/en/docs/Anti-Features/

## Similar mobile apps

- [Tuta Calendar](https://appsgit.com/mobile-apps/tuta-calendar): Quantum-safe encrypted planner to schedule & manage your events & sync calendars. (7,986 stars, GPL-3.0-or-later, official)
- [DAVx⁵](https://appsgit.com/mobile-apps/davx): CalDAV/CardDAV Synchronization and Client. (2,931 stars, GPL-3.0-only)
- [Fossify Calendar](https://appsgit.com/mobile-apps/fossify-calendar): Securely plan, schedule, and set reminders with our private calendar app. (2,205 stars, GPL-3.0-only, official)
- [Birday](https://appsgit.com/mobile-apps/birday): A simple yet useful birthday manager. Birday is free and ad-free! (1,193 stars, MIT)
- [Persian Calendar](https://appsgit.com/mobile-apps/persian-calendar): Android Persian Calendar. (984 stars, GPL-3.0-only)
- [Fossify Contacts](https://appsgit.com/mobile-apps/fossify-contacts): Manage your contacts privately and efficiently with vCard support. (916 stars, GPL-3.0-only, official)

---

Canonical page: https://appsgit.com/mobile-apps/etar
Source: appsgit (https://appsgit.com), the app store for github. Data from the GitHub API, refreshed nightly.
Machine access: JSON API https://appsgit.com/api/v1/apps (OpenAPI: https://appsgit.com/openapi.json), MCP server https://mcp.appsgit.com/mcp, full index https://appsgit.com/llms-full.txt.