There are two versions of the app available in the Google Play Store.

Both apps are compatible with all Android smartphones and tablets.

In the full version , the actual position of the ship is constantly shown on the map and The card will be automatically adjusted to the position.
    Install Full version

The 'Trial Version' is free and works the first 30 days exactly the same as the full version.
After that the vessel will not be shown anymore, all other functions stay the same!
    Install trial version