Seapilot is a free Android application that allows you to use professional marine navigation technology on your device. This technology was previously only available on expensive GPS plotters used in merchant shipping. With Seapilot, you can navigate, plan your next boat trip, or simply reminisce about your last one. Even if you're not on the water, you can still use the app from the comfort of your own home.

However, it's important to note that while Seapilot is free to install, you will need to purchase a license and charts from seapilot.com in order to use it. The app also offers new Hydrographica charts for Sweden, which provide detailed, high-resolution charts for the country's waters. This feature allows you to safely explore the scenic archipelagos of Sweden.