You can download the marine chart app by going to the following link in your Android phone.
http://gpsnauticalcharts.com/main/natuical-charts-app-software
The marine chart app provides full coverage for all NOAA charts covering US and all UKHO/Admiralty charts covering UK.
The complete list of charts supported by the app is available at the link below.
A complete list of supported features of marine charts app for Android and Blackberry is available here. Feel free to drop us a line for any feature requests, comments.