OpenCPN

★★★★★ Lots of features, just a beginner, can import and export GPX tracks, routes, waypoints easily with the app and the PC, and the Garmin Chart plotter.

★★★★★ New to sailing and chart plotting, but I've been pleased so far. On a race last night, I navigated and tracked our sail while another on board with Avionics ended up with an incomplete tracking log (iOS issue with app sleeping it seems). I'll update review as I use more features. Oh, and I was able to export GPX of the sail for importing into Sail Ties. Overall the app seems clunky in places but powerful.

★★★★★ There is a bug in the latest version, OpenVPN doesn't see .GPX files in the /downloads folder. The workaround is to rename the .GPX file to .JPG, and then it will see and import the file properly.

★★☆☆☆ I use OpenVPN on Windows, it works great. Cannot find the oeSENC plugin on play store to download charts though. App is no use without charts!

★★☆☆☆ I gave up after trying to get charts loaded on to my android pad. Just to many steps, to many places to mess up. PC based chart loading is integrated into the app. Android requires you to have several other android apps and system knowledge to get the charts located in the correct place. Just not practical. Gave up.

★★☆☆☆ This version caused me grief trying to add my charts, harmonics files and routes. It was difficult to specify path and when I 'poked' the app folders and added my harmonics files I could see the files in the settings, but the app froze when the file was added. I eventually got it to add my harmonics files by clearing the app cache first. The same thing happened with routes GPX file, cleared cache and routes imported ok.

★★☆☆☆ Does okay as a standalone chart plotter but cannot import GPX files where all other Android chart plotters have no issue. I use OpenVPN on my computer to create my routes and then import them into Aqua Map.