AS app (and full site) shows the number of people on the complimentary upgrade list as well as the number of people "awaiting seats". Keep in mind that the "awaiting seats" folks include people who have purchased tickets but do not have a seat assignment. This number only includes people who have checked in for the flight so the place on the list can and does change until the cut off time arrives. What it does not show is how many are actually nonrevs.