Party planners, private clubs, and venues use 4-Invite-Only to create events, send and manage invitations, and track event attendees. Whether the event is only a couple of people or thousands of people, the app lets party planners maintain their attendee list and track who attended. If you are invited to private events, you can accept or decline the invitation and check-in to the event using the app. 4-Invite-Only is used exclusively for members-only or invitation-only events.