Does anyone know of a sort of RSVP app so if I'm organizing a pretty big event, I add all the attendee's names to that app? (Preferably it syncs to a Mac to do this though, but it's fine otherwise). Then, next to everyone's name, there are 3 check boxes: RSVP; arrived; payed for food, etc. Is there any app that is even remotely similar to what I'm talking about or is someone willing to make one? Thanks in advance for any suggestions!