By pointing the camera towards the ground, it will show a visual boundary of 2 meters around you, basically a little over 6 feet that is recommended by the health authorities.
Social distancing measures may not be as strict as they were last month, but you should still try to stay away from people as much as possible when you're outside.More news: Astronomers May Have Found the Universe's Missing Matter
Since it is web-based, you do not need a special app to run it, though it appears to be restricted to Chrome on Android. To prevent the spread of the coronavirus, you need to ensure the person you're talking to is outside of that curve.More news: Renault to cut 14,600 jobs as part of €2bn cost-saving plan
Like Snapchat's lens, this new tool simply puts an AR representation of the minimum distance into the frame, therefore encouraging you to give others enough room.
As mentioned already, Sodar is not a standalone app, but works from the browser on mobile devices. That said, it will only work using Chrome on Android devices, and some Android devices may not be compatible. However, as per a report by 9To5 Google there are two workarounds using which users can enable this feature on their Android smartphones. For adding the app to your home screen if you plan to launch it whenever you go out, you can tap the three-dots menu at the top right corner on Google Chrome and select the Add to Home Screen option. It's part of Experiments with Google, a division that regularly dabbles in early-access apps.More news: Khloe Kardashian under scrutiny for picture editing
Image Source: Google Coronavirus social distancing AR app: Google Sodar in action.