For quite a few years, Apple has made Apple Pay extremely easy to use, and one of its best ease-of-use tricks is to allow NFC-powered Apple Pay to launch the instant it detects an NFC signal. The user doesn’t have to launch an app, or even to click on anything. The phone can be in airplane mode as well as not riding local Wi-Fi. Mere proximity to the signal does it all, with a quick finger scan or face glance being all that is needed to make the transaction happen.
Källa: Apple finally shares its automatic NFC launch capabilities, albeit in a very limited way
