Excellent app with a few minor improvements required.

1- impossible to calibrate the artificial horizon while in flight (or when engine is on) as it is too sensitive.
2- compass gives false reading when on artificial horizon mode. (keeps on turning,,,)
3- maps- will be helpful to be able to get google maps, or other local maps, with higher resolution, as an additional layer.

Other then that - excellent app. I bought the Garmin 695, and dont use it, since this is app is up and running....

dkuli about Air Navigation Pro, v4.2.1