Robert M. Gary wrote:

I've downloaded PocketFMS for my PC (haven't figure out yet how to get
it on my PDA). To be honest, I brought it up and tried to play with it
but found, without actually reading the manuals, I wasn't able to get
it to do anything.

Have you actually loaded the FIRs for where you are ?
Have you set your current lat/lon (or tried to connect a GPS) ?

PocketFMS does flight-plans, airspace info and a heap of other
stuff and even a cursory reading of the help-file will show
you what features are available and how to use them.