HomeAppsMaps & NavigationOpenCPNApps like OpenCPN Here are some great alternatives to OpenCPN by Dave Register : i-Boating:Marine Navigation ★4.1 NavMonitor ★5.0 Weather - Routing - Navigation ★4.5 Pro Weather Routing Navigation ★4.8 Imray Navigator ★3.8 GPX Viewer PRO ★4.4 mKart Marine Navigation ★3.4 Simrad: Companion for Boaters ★4.0 AIS Flytomap GPS Chart Plotter ★4.4 Garmin ActiveCaptain® ★4.1 NetGPS ★4.1 C-MAP Boating ★4.0 Memory-Map ★3.8 Navigraph Charts ★4.7 GPX Viewer ★4.3 Orca: Boat GPS, Charts, Routes ★3.7