Fantastical includes a number of tools to make it easy to manage invitations to and from other people.
Inviting people to events
Fantastical will search your Contacts when it looks like you're trying to invite someone to an event. For example, typing "Lunch with Beth tomorrow" will allow you to quickly invite Beth to the event. Fantastical will also search for contacts stored on your Google or Exchange server, providing you've added at least one of those accounts to Preferences > Accounts.
If you're creating an invitation on an Exchange calendar, you can choose whether the invitee needs to send a response or not. In the event details, click the invitee's name to choose whether to request a response or not.
Checking contact availability
After adding invitees to an event a check or cross icon will appear next to their name, indicating each invitee's availability at the time of your event. A yellow exclamation mark icon indicates that your contact is not available on the server, and thus availability is unable to work. Please note that iCloud does not support availability.
In addition to using the check and cross icons for a quick indication of your contacts' availability, a more detailed availability view can be displayed too. Click Check Availability to open a schedule planner and observe your contacts' availability throughout the day (click the button to the right of the date to open this view in a separate window). In the bottom-left of the availability planner, you can use the pull-down menu to toggle the timeline to either display "All Day" or "Work Hours" (work hours are configured in Preferences > General > Day starts/ends at). The Next Available Time command is the quickest and easiest way to schedule an event, with Fantastical instantly performing the hard work of finding a time when you and your invitees are all free. You can also configure a time manually, and if one of your contacts has an event booked for the time of your event it'll turn red to indicate a conflict.
The availability window can also be shown from the Window menu after selecting an existing event. This allows you to see if your invitees' availability has changed, or to quickly reschedule an event to another suitable time.
Responding to invitations
When you receive a new invitation you'll see an inbox icon appear at the top of the window. Click this icon to view all your pending invitations and choose to set your status to Accept, Decline or Maybe by clicking the corresponding buttons. If you have multiple pending invitations, you can hold the option key to quickly take action on all invitations with one click.
Click and hold on the Accept, Decline, or Maybe buttons to respond to an Exchange invitation without sending a message to the sender.
Propose new time
If you receive an invitation with a time that's not suitable, locate the invitation on your calendar and double-click it to see the Propose New Time option. Click this option to choose an alternative time and send it to the organizer to review.
If you're using Exchange then the new time proposal will be sent automatically through your Exchange email. If you're using a CalDAV-based calendar service instead, such as iCloud or Google, then Fantastical will create a special email that contains an .ics file of the new time proposal and any comments you added to the proposal.
Hangout, Meet and Zoom calls
Pre-existing Hangout and Meet links created on Google Calendar's website will be visible in an event's details. Click the link to join the call. Zoom calls are also available in Fantastical. Add a Zoom account to Fantastical's Preferences > Accounts > + > Zoom. You'll then see a 'Zoom Meeting' option appear in your events. Use this option to create Zoom meetings directly in Fantastical and the meting will be set up and sent to your invitees.