This application is mainly for the event management companies (as a user) for performing the guest check-in operation at the particular event and tracking guest arrival/check-in or not.
As the large events is having multiple entry gates so this app will be used at those multiple entry gates and through the app a person at the gate will perform the check-in operation and marked that guest as a checked-in on guest arrival (The guest of that event is already added from the website to that event).