That's correct - a passenger could use this service to send a timely reminder to their ride. This is doubly useful since, even if a passenger were to track the

That's correct - a passenger could use this service to send a timely reminder to their ride. This is doubly useful since, even if a passenger were to track the flight and determine the correct departure time (which the app does automatically), there is no easy way to send a message while on the flight.