Op-portunist has developed the project as part of the preventive measures of crowd density of the area which cause risk of virus spread. It will hopefully rebuild trust in public space. Crowd check is a web-based platform that informs the crowd density at public venues. Crowd check assists journey planning with real-time density checks disclosed to the public. It measures the crowd density by capturing real-time Bluetooth signals, representing the number of people, and analysing the number in relation to the location's capacity