Earlier quoted context omitted.
Another app to install and leak my privacy. No thanks. I’ll wait in line for a key card.
What information will the app have that the hotel wouldn’t have at check in?
I wouldn't go to lengths avoiding installation (just remember to uninstall if it really bothers you), but I'd prefer a purely web based implementation. How about clearing arbitrary NFC UID for access? (From a self-serve counter if taking humans out of the equation is so much of a goal) The credit card form factor is certainly not inconvenient at all, but dealing with them can still be surprisingly annoying when that happens to coincide with oddities from the very long tail of luggage situations.