First of all, it crashes a lot... Secondly, it is poorly designed, there are "free apps" that are much better... This is nothing more than an app to run other paid charts with, however it can not even do that well...on both iPhone and iPad... Save yourself some money and frustration and avoid this app!
Does not download and display NOAA charts correctly, coordinates are off significantly on top of only displaying individual charts one at a time... No quilting of charts! Plus you have to start from scratch selecting a chart each time you exit the app not counting when the app crashes.
Offshorecowboy about iNavX: Marine Navigation, v4.7.1