Moon Finder is a free Android app developed by YoelApp that helps users locate the new moon at the beginning of every lunar month. The app is designed to solve the challenge of identifying the new moon, which is often difficult to spot because it is small and dim and blends in with the sky background. Moon Finder calculates the moon's location and guides users to the correct place in the sky.

To ensure accurate results, users need to calibrate their compass by rotating their device in the shape of the number eight. Alternatively, they can search "Compass Calibration on Android" on Google to get the necessary instructions. With Moon Finder, users can easily locate the new moon and enjoy the beauty of the lunar cycle.