Well it depends on how much of a cheap
skate you are...
I downloaded the Garmin iPad
planning app WITHOUT charts
. Thats free. And it takes Active Captain
, and has the real time GPS
tracking. So if you kninda know where you are and can deal with the basic outline of the land only then thats a good one... good for a test.
I also have Navamatics with USA east coast charts
. Thats OK but not as good at iNavX
will not take Active Captain