Almost all Android smartphones older than 2014 can scan a smart business card. No special apps are needed for Android devices. Typically, Android's NFC module is located in the center of the phone's back cover. You need to turn on the NFC function before using it. QR code scanning through the camera is available to all.
iOS: iPhone XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, iPhone X, iPhone 8 and iPhone 7, 6, 5, 4 can read a business card without installing special apps. These models have an NFC module to the right of the rear camera. Earlier models will be able to scan a QR code with the smartphone camera. Or by activating the NFC reader at the Control Desk.
A full list of compatible devices can be found
here.