APPLE and GOOGLE have presented a device tracking potential spread of COVID-19

For the first time APPLE and GOOGLE have teamed up to develop a device to monitor and track contacts of people infected with COVID-19. The control function will be built into iOS and Android operating systems. 
The new device is called Exposure Notification, which will be integrated into the user's device system and will allow you to monitor possible contacts with sick people.
Often, many patients are asymptomatic with coronavirus infection, and do not always know that they could infect someone. It is expected that this system will simplify the search for new infected contacts; as a result the burden on the healthcare system will be reduced.
The interaction of user devices is performed via Bluetooth, collecting no user geodata, but working as a beacon. When two people begin to interact with each other close enough, the system captures this event, allowing you to further obtain a picture of the potential patient contacts over a long period.

Source: APPLE