# Open-source calendars

7 open-source calendars rated against public privacy criteria.

1. [Baïkal](https://privacyratings.com/calendars/baikal/): B (80/100). Self-hosted CalDAV and CardDAV server written in PHP and built on the sabre/dav library, with a web interface for managing users, calendars and address books.
2. [DAVx⁵](https://privacyratings.com/calendars/davx5/): B (80/100). Android app that syncs calendars, contacts, tasks and files with CalDAV, CardDAV and WebDAV servers, so they appear in the device's own calendar and contacts apps.
3. [Etar](https://privacyratings.com/calendars/etar/): B (80/100). Open source Android calendar app based on the AOSP Calendar. Shows calendars stored on the device, including offline calendars and CalDAV calendars synced by an app such as DAVx5.
4. [Fossify Calendar](https://privacyratings.com/calendars/fossify-calendar/): B (80/100). Offline Android calendar from Fossify, a community fork of Simple Mobile Tools. Supports widgets, reminders and ICS import and export, and can show CalDAV calendars synced by an app such as DAVx5.
5. [KashCal](https://privacyratings.com/calendars/kashcal/): B (80/100). Offline-first Android calendar that syncs with iCloud, CalDAV and the device calendar. Needs no account, has no telemetry and stores credentials in the Android Keystore.
6. [Nextcloud Calendar](https://privacyratings.com/calendars/nextcloud-calendar/): B (80/100). Calendar app for self-hosted Nextcloud servers. Syncs across devices with CalDAV and supports shared calendars and appointment booking. No end-to-end encryption.
7. [Radicale](https://privacyratings.com/calendars/radicale/): B (80/100). Lightweight self-hosted CalDAV and CardDAV server written in Python, for syncing calendars, contacts and task lists across devices. Stores data as plain files.

Source: https://privacyratings.com/open-source/calendars/