I have iNavx as we'll (I'm the Navigator on a LHD). I use it as a portable reference to carry around from meeting to meeting. It is pretty decent. Not quite as handy as FF, but the closest thing I have found. I also has a tide/current app that is very useful.I use iNAVX on the I pad on my boat. Works great ,you buy a subscription like fore flight.
Sorry,I don't know what's best, I don't use any.
It's coming out soon, but will be named ForeFloat.
, awwww, I'm killin me.
With all those christmas lights in your plane, you still use a sextant in the boat?
Nobletec?
Garmin 496 has marine mode, and "blue charts." One blue chart chip I have goes from Olympia to Skagway, and replaces a thousand charts.