Banana X is a free mobile app that provides real-time beach, water, and weather information, as well as surf forecasts, based on data from the Korea Meteorological Administration. It has a mobile-optimized interface and can be used with a single finger.

The app can also be used to check the surf conditions at your favorite beach, with a list of the most popular spots in the country. Additionally, it provides information about the local surf scene, including the best surfing spots, shops where you can rent equipment, and more.