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DAVx⁵ICSx⁵
Free

The open-source edition is available at no cost from F-Droid.

 Free

Free and open source under the GPL-3.0 licence.

Android Android
  • Two-way sync of contacts, calendars and tasks in one app
  • Works with the calendar and contacts apps already installed
  • Works with any Android calendar app
  • Supports both Webcal URLs and local files
  • Android only
  • Needs a CalDAV, CardDAV or WebDAV server to sync with
  • Subscribed calendars are read-only
  • No two-way sync; DAVx⁵ is needed for that
Downloadable app Downloadable app
Open source Open source
License not stated License: GPL-3.0-only
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.