The Navionics apps don't show up in the Android Marketplace on my phone... and I'm running v. 2.1 of android. UGH.
The app is not available in all countries.
You need a sim card from at country that will give you all apps on Android market.
I had the same problem but the sollution was to buy a cheap sim card for UK and dowload the app with wifi with this sim card in the phone, and pay with the google account
Anyway I can't get the app working as it should on my Galaxy i 9000- I cannot see the map details yet but hope to fix that.
DonŠt know if my phone is compatible even if it has Android 2.1