Sorry, I meant as far as how many years it took to release an OS that natively supported QR code scanning. However, I double-checked and it looks like Oreo was

Sorry, I meant as far as how many years it took to release an OS that natively supported QR code scanning. However, I double-checked and it looks like Oreo was the first version of Android to offer it natively via built-in Google services, and iOS got it with iOS 11, and both OSes released in 2017.