Best maps
This app has the best nautical maps. It has more detail than navionics or blue chart. The only problem is that the maps do not connect, so one needs to switch maps as you travel. I dropped my rating one star after the update as theyr weather does not work as advertised. It does not display as an overlay and simultaneously replaces the underlying chart with a solid tan box.
Isleofgough about
iNavX: Marine Navigation, v5.0.3