https://www.techradar.com/news/ios-12-could-let-you-unlock-your-hotel-room-with-nfc

With Apple expected to reveal some of the big features of iOS 12 in a couple of weeks' time, there's some advance news on what one of those features might be: the ability to use your iPhone as a secure door key for a hotel room, thanks to the magic of Near Field Communication (NFC).

That's just one of the potential uses of the technology, which is being opened up to developers in iOS 12, according to The Information. Apps not made by Apple were given a limited amount of access to the iPhone NFC chip with iOS 11, but apparently a lot of the restrictions are going to be lifted, letting developers build more advanced features.