Excellent App

Have personally used this to fly over 3000nm in both Canada and the USA, including flying into the Washington DC SFRA.
Its extremely helpful and accurate.
I would / have recommended this to many other pilots.

Only a couple things missing which I suspect they may add.
Airport diagrams. Geo-located would be nice
A timer x 5. Ie fuel tank switch, etc click resettable.
Auto gps connect, via Bluetooth with iPhone, you now manually do it, no big deal just a nuisance.

Tube_XCS about Air Navigation Pro, v4.1