There are a couple of other options for tablet/phone nav programs.
Embark (
www.letsembark.io) uses C-Map cartography and cloud based storage the app is free, the charts are reasonably priced. The program can be used online for free. With an account the routes and waypoints are saved and downloaded to any devices, including some chart plotters, when connected to the cloud. It is nice to sit in front of a large computer screen and plan the trip and then download it to the tablet. The charts are all vector charts.
Aqua Map (
Aqua Map - Marine GPS, Boating Charts, Lake Maps) is a tablet/phone app that is free. Charts are downloaded in sections and appear to be reasonably priced. Folks on the ICW like the app because it uses crowd sourced depth information. Good for areas that frequently shoal.
I have used Embark and like it. It is easy to use and has an auto route feature and it integrates well with my B&G electronics. The one downside I have found is cross platform integration requires an internet connection.
I only learned of the Aqua Map program after the boat was hauled, haven't used it yet.