Lens Calculator (CCTV) is a free application available for Android devices. As the name suggests, this app helps calculate the lens requirements for CCTV cameras. It assists in determining the horizontal, vertical, and diagonal angle of view. Additionally, it calculates the size of the surveyed area at a given distance (height/width/diagonal) and the maximum distance from the camera to the object for its detection/recognition/identification.

The app has a simple interface, making it easy to use for both professionals and amateurs. It provides accurate calculations, which is crucial for CCTV camera installations. The app is lightweight and doesn't take up much space on the device. Overall, Lens Calculator (CCTV) is a useful tool for anyone looking to install a CCTV camera system.