Free iPhone nav
 

I will be doing some flights on a 152 and i would like to plan the flights using my iPhone. I have found some great apps ForeFlight and Air Nav Pro. They do just well, they work offline, allow me to add user waypoints and allow me to create the full route, just like a garmin. Problem is they require me to buy a US or Canada subscription to continue using the app and I just need a Portugal map.

Are there any free apps that can do all this? Even if they use google maps it's ok, I guess I can receive 3G data at FL60.