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eM ClientOneCalendar
Freemium

Free licence for personal, non-commercial use with up to two accounts; Personal from…

 Free

Free to download from the app stores.

Windows, macOS, Android, iOS Windows, macOS, Android, iOS
  • Handles Gmail, Microsoft 365, Outlook, Exchange and plain IMAP without plugins
  • Email, calendar, tasks, contacts, notes and chat in one polished window
  • Supports Google, Outlook, Exchange, iCloud, CalDAV and many other providers
  • Available on Android, iPhone, iPad, Mac and Windows
  • No Linux version
  • The free licence is capped at two accounts and forbids any commercial use
  • Closed source
  • No Linux version
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
Account needed Not stated if an account is needed
Works offline Works offline

Checked September 20, 2026

Checked October 2, 2026

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