MD COVID Alert is an Android application that you can use to get notified about a dangerous contact with infected people. You can also warn others if you have positive test results.
The app focuses on people who live in the state of Maryland. Some regions in the United States of America currently has their own utility for stopping the COVID 19. For example, citizens of Colorado can use CO Exposure Notifications.
You have to provide the application with access to Bluetooth and the current location of your smartphone. Once it is done, you can get notifications while you are near to a person who has coronavirus. The utility does not share your geolocation with third parties.
Moreover, there is the ability to show the results of your test if they are positive. The application will automatically notify people who were in contact with you. It is important to say that your identity will remain anonymous.
This is the official application of the Maryland Department of Health. Using it lets you contribute to the fight the spread of COVID 19.