Navionics is fantastic, but it is an app for a phone, so not much good on the water. For paper charts you have to pay for them – about $20 at any marine store. All US marine charts are free. Ours are not. You can purchase the electronic charts for a GPS and print what you need and there are printable electronic charts but they are expensive and you get a lot that you never use.
The bought paper charts are strong and you can use them over and over. They get more fun to look at the more you use them.