Nice
Id never heard of this until I saw it advertised at Billy Bishop Airport in downtown Toronto. Used it to go through Customs in Newark. We did have to try a bunch of times to get the QR code to scan but this was a minor inconvenience as I skipped a massive lineup and only had to go to one with only a handful of people at it. Will be even better for flights with no checked bags as you get through customs before your bag is off the plane!
2fruition about
Mobile Passport by Airside, v1.1.3