Hi Eric,
Thanks so much for reaching out and for your interest in our products!
With Event Aggregator, you have the ability to select which calendar you import from. To give you a better idea, here is a screenshot of the options you will see with Google Calendar:
As you can see, you have the ability to schedule imports, and have the data fetched On Demand, as well as on a schedule.
I hope this helps to answer your questions! Please let me know if anything else comes up!
Thanks,
Jaime