At 2020, we had a pain point in Viet Nam because health official requires to do contact tracing when people went to events, churches, schools so we scratched ou

At 2020, we had a pain point in Viet Nam because health official requires to do contact tracing when people went to events, churches, schools so we scratched our own itches and developed QR Code Attendance addon https://workspace.google.com/marketplace/app/qr_code_attendance_for_classroom_employe/372652717544 https://workspace.google.com/marketplace/app/qr_code_attenda.... After that, we provide our addon in G Suite marketplace and a lot of customers used our addon for contact tracing, for example take temperature, name, health status of attendees and give data to health official.