Getting started with Fantastical is simple. First, you need to add your calendar accounts in Preferences.
Start by clicking on the Fantastical icon in your menu bar to reveal the Mini Window, then click the gear icon in the lower right to open the actions menu. Choose Preferences from the menu. You can also access the preferences by selecting Preferences from the Fantastical menu.
To add a new account, go to the Accounts pane in Preferences.
If you have a standard iCloud account login, adding your account to Fantastical only requires your username and password. If you've set up two-factor authentication, there are a couple of extra steps.
To add a Google account:
To add an Exchange account: