Clusterf@ck
It doesnt work and the airport staff is completely useless in navigating the app while actively telling people in line to get out of line and download the app. We got to the final stage of the app in which we were waiting for a receipt and it failed to issue a receipt. Waste of time, which is to be expected from the app approved by DHS.
Thirsty Scholar about
Mobile Passport by Airside