Company Navimatics Corporation created these great apps:
Charts&Tides (US Great Lakes), Aero Charts (Alaska), Charts&Tides (US West), Charts&Tides (US East), Charts&Tides (US Gulf), Celestial by Navimatics, Charts&Tides (US&Canada West), Charts&Tides (US&Canada East), Charts&Tides (US&Canada Great Lakes), Charts & Tides, Charts & Tides, and others..