A free program for Android, by GeoThinkTank LLC.

Nautical Eye, is the best app for sailors, fishermen, and those who are interested in marine and maritime matters. It offers a great selection of marine charts, nautical charts, marine maps, and much more. All of this is available at your fingertips. 

The application can also be used for fishing, boating, and other water-related activities. It is designed to provide the best possible conditions for your activities. The app will do all the work for you. You will be able to see all the important data that is needed for your operation. The app will help you to make the best decision. It can also be used to plan a trip.