Does every attendee need the Invitation Code?

No, the majority of attendees won't need an invitation code. The invitation code is only required if a user is logging into Whova with an email address that is not on the Attendee List.

Attendees who are already on your attendee list will be able to access your event as soon as they download the Whova App and sign in with the email address that appears in your Attendee List.

P.S. In case this didn't fully answer your question or want to see a live demo or ask live Q&A, join our Event Overview Whova Academy! We host a live session covering the event Overview and Setup every Monday at either 9AM or 1PM Pacific Time.