In addition to the Calendar Builder, ICS Calendar Pro provides complete support for the standard manual shortcode-based approach to creating calendars from the free ICS Calendar plugin, with additional support for the extra views (layouts) and options included in the Pro version.
[ics_calendar url="https://example.com/feed.ics" view="month-with-sidebar"]
You can even mix-and-match individual shortcode settings with a saved calendar ID, allowing you to override specific settings of the saved calendar in individual instances around your site.
[ics_calendar id="1234" description="Customized description."]
A full list of the ICS Calendar (free) configuration options is available in the User Guide. (Additional Pro-only parameters will also work in shortcodes, but are not part of the official documentation at this time, since they are easier to configure using the Calendar Builder.)