This PowerApp is geared at checking in attendees at an event or marking them as not coming. Start by adding an event in a city, then add a list of attendees. On the day of the event, as attendees arrive, you can check them in or mark them as "no-shows". In the real-world, Pragmatic Works uses this app to read from an Azure connected database of many events and thousands of attendees to simplify our check in process so any speaker can check the attendee in from their phone.