This is a High Definition 3D theme for Marine Compass, with finer geometry and more details. This app may use gyroscope on some devices to improve rotation accuracy.
Please consider purchasing this add-on if you wish to support the free Marine Compass app.

Please note this app will not appear in the list of apps and cannot be launched: its purpose is to provide a theme for Marine Compass. It can be selected through the settings screen of Marine Compass, under the Theme option.