Near Field Communication (NFC) technology allows customers to make secure transactions and connect electronic devices with a TAP. NFC transmissions are short range (from a touch to a few centimeters) and require the device to be in close proximity.
NFC table ordering in action - https://www.orderup.com.au/table-ordering-2020/
How do I use NFC on my Android?
On your Android device, tap on “Settings.”
Select “Connected devices.”
Select “Connection preferences.”
You should see “NFC” and “Android Beam” options.
Turn both of them on.
How do I use NFC on my iPhone?
Go to Settings > More.
Tap on the NFC switch to activate it
The iPhone 6 and 6 Plus have NFC, but only for payments. The iPhones 7, 8 and X also have NFC for payments but additionally, with iOS 11 and an NFC App, they can read NFC tags. The latest iPhone XS, XS Max and XR have NFC for payments and can read NFC tags with or without an additional App.