How to scan a QR code on iOS

  1. Open the Camera app from your device’s Home screen, Control Center, or Lock screen.
  2. Hold your device so that the QR code appears in the Camera app’s viewfinder. Your device recognizes the QR code and shows a notification.
  3. Tap the notification to open the link associated with the QR code.

Or you can visit this link in your browser: https://itunes.apple.com/us/app/trader-chat/id1086318094?mt=8