Rangefinder is a free Android app developed by Rangefinder App Developer that belongs to the Utilities & Tools category. The app aims to help users measure the distance between themselves and faraway objects by using a collection of objects with known heights.

Upon opening the app, users are greeted with a simple interface that allows them to select the type of object they want to use for measuring distance. Once selected, the user is prompted to input the height of the object in question. To measure the distance, the user points their camera at the object and adjusts the crosshairs until the top and bottom of the object align with the markers on the screen. The app then calculates the distance based on the known height of the object and displays the result on the screen.

Overall, Rangefinder is a useful app for those who need to measure distances quickly and easily. The app is easy to use and provides accurate results. However, it is worth noting that the accuracy of the results may vary depending on the user's ability to line up the crosshairs accurately and the accuracy of the height measurement of the object being used.