General
Sodar is an experimental Google app that through the phone's camera and through the use of augmented reality allows you to check, using guide lines, whether the person is maintaining the appropriate distance from those around them (the recommended two meters).
In the camera of the app you will see a white ring and dots that mark the area of the perimeter.
This app works through Chrome on all Android compatible smartphones. To enter the application it is not necessary to download it, you can enter here and read the QR Code that opens in the browser with your camera.
Link: https://sodar.withgoogle.com/