There was a time back in covid days where you had to have an app on your phone to go through customs clearance in Canada.
I flew from Canada to Australia during deep Covid ($15k flight, mandatory locked in hotel for 10 days for $3k, etc)
I don’t have a phone.
I refuse to believe that's true. That they were denying Dorothy (92) from going through customs because she couldn't use an app. That's an extraordinary claim.
If they weren't denying Dorothy, that means you did not need an app.
I flew all over europe, no smart phone, no mask. I printed my own doctors notes and corona passports and they worked flawlessly everywhere.
Towards the end, I copied other peoples QR-codes and printed them out, and that worked nicely as well.