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Known limitations

A few things KashCal doesn't do, either on purpose or because of how a server works. Knowing them up front saves a surprise later.

Invitations depend on your calendar account​

Sending and receiving meeting invitations works only with calendar accounts that support scheduling:

  • Local-only calendars can't send invitations. If you add guests, they're saved with the event but not notified:

    This calendar can't send invitations. Guests are saved but won't be notified.

  • Some accounts don't support inviting people at all, in which case KashCal tells you:

    Inviting people isn't available on this account

  • A few servers accept guests but never deliver the invitation. Some CalDAV servers (SOGo and mailbox.org are the ones we've seen) save your guests without sending anyone an email, and they don't report this back, so KashCal can't warn you in advance. The guests are on the event, but they aren't notified. This matches how other calendar apps behave: when a server won't deliver, sending the invite is up to you. Major services like iCloud generally deliver as expected.

RSVP to a recurring event covers the whole series​

When you respond to an invitation for a repeating event, your reply applies to the entire series, not a single occurrence:

Your reply applies to the whole series.

This is because not every calendar server supports per-occurrence responses.

Account passwords don't transfer between devices​

For security, your saved passwords are encrypted to your specific device and are not included in backups. When you switch phones, you re-enter them. See Privacy & Security.

Background sync is at most every 15 minutes​

This is an Android platform limit for background work, not a KashCal choice. Pull to refresh any time for an immediate sync.

Calendar feeds are read-only​

Events from an ICS subscription can't be edited in KashCal. They belong to the source feed.

KashCal handles calendar events, not contacts or tasks​

KashCal is an events app. It reads and writes calendar events (the VEVENT part of the calendar standard) and nothing else:

  • No contacts (CardDAV). KashCal doesn't sync address books. It does read birthdays and anniversaries from your phone's contacts, see Contact birthdays, but that's a one-way read, not CardDAV.
  • No tasks or to-dos (VTODO), journals, or attachments. Calendars that contain only tasks or journal entries are skipped during sync rather than shown as empty.

This keeps the app focused and fast. A separate tasks or contacts app is the right tool for those.

Google and Outlook connect through your phone, not directly​

KashCal talks to iCloud and CalDAV servers directly, but neither Google nor Microsoft offers that kind of access anymore. Google removed third-party CalDAV access, and Outlook and Microsoft 365 don't expose CalDAV at all. So both come in through the Device calendars bridge instead: if the Google or Outlook app already syncs those calendars to your phone, KashCal can show and edit them. See Device calendars and the FAQ.

Views are the seven built in​

KashCal offers month, agenda, day, 3-day, week, full-month, and year views, plus Insights. There's no multi-month grid (like a 3- or 6-month view) and no non-Gregorian calendar system (such as Hijri or lunar). The Gregorian calendar is the only one available.

If something you expected to work isn't listed here and isn't covered in Troubleshooting, then it may be a genuine bug. See Before you file a bug.