This is an iPhone app which can help you plan and organize a function like a party or a conference.
You can create a pool of people and continuously update on the status on whether they are coming or not.
And during the function, you can use the app to monitor who have arrived and who have left.
By using CKCloud, users can share the information among themselves and update status of the attendees on a collaborative basis.
You can place people in a pool on different lists for finer handling. You can use this function to plan seating of the guests at different tables.
A separate history page can give you at a glance all the comings and goings.
There is a help page in the app to guide you.