A sincere "fuck you" to #GetYourGuide (and any other app) which listed a tour fully online, let me pay and complete the transaction, and email me the result. But instead of emailing me a QR code, it emails me a link to their *native app*, forces me to install the 40 MB binary on mobile roaming data, remember the password to log in to the same one-off account made to purchase the ticket, *and then* show me the QR code to show the tour guide. Just email me the damn QR code!
This accomplishes *nothing* but adding 14 clicks, 5 - 20 minutes to the check in time (depending on how easily the user guesses their password), and requiring a mobile data connection.