Contractors may only be on your site for a few days, but its is still important to include them in your system. Use the QR code, perhaps on a poster during induction, to connect them quickly. The mobile app is intuitive, with no training needed.
Once sent, information comes securely into your system where it can only be read by people with the correct permissions. Data is not stored on the phone, so it can’t be viewed in the mobile app later when the contractor has left your site.