Surveyor is an Android app developed by Idea Matters that allows you to measure distances by placing virtual markers on a camera image. The app overlays a virtual ground on the camera image and locks it to the real world, ensuring that the markers stay in place even if you turn the camera in a different direction. The distances between each marker are calculated and displayed on the screen in the unit system you specified. With the pro version, you can add more than two markers and even get the area of the space surrounded by the markers.

The app is a great tool for those who need to measure distances on the go, such as real estate agents, construction workers, and outdoor enthusiasts. It is easy to use and provides accurate measurements. The app is compatible with Android 9.0 and is available for free on the Google Play Store.