The web-based app uses AR like Snapchat's Lens and is currently only available on Experiments with Google as of now, as it's only in the early stages.
However, it's aim is to help make sure users are staying the recommended 2 metres (six-feet) when out and about amid the coronavirus pandemic.
It moves with you and shows a virtual boundary on screen.
The app uses Google Chrome on mobile and requires WebXR technology, which is only available on Android devices.
In a Tweet, Experiments with Google announced: "Sodar - use WebXR to help visualise social distancing guidelines in your environment. Using Sodar on supported mobile devices, create an augmented reality two meter radius ring around you. #hacktohelp https://sodar.withgoogle.com (sic)"
It's possible to try out Sodar by heading to sodar.withgoogle.com