This App Reads the Bar Code and QR Code. Easy to find the website link and Share link immediately to other communication apps. QR codes can be used on various mobile device operating systems.
These devices support URL redirection, which allows QR codes to send metadata to existing applications on the device.
QR codes can be used to log into websites: a QR code is shown on the login page on a computer screen, and when a registered user scans it with a verified smartphone, they will automatically be logged in.
Authentication is performed by the smartphone which contacts the server.