alt Hacker NewsRyanair FAQ may be out of date then. I have a Ryanair flight booked. In the portal, it says "You must download the Ryanair App. This is the only way to access your digital boarding pass, paper boarding passes are no longer issued or accepted."
Will see about Wizz, maybe it was only Ryanair.
I flew with RyanAir once after the rules changed, did online check-in on a computer, at the check-in desk at the airport got a paper boarding pass for free, just had to pretend that my phone died and that I have no charger with me.