Why is the app unable to find my location?

Make sure that your device is equipped with an internal GPS sensor. If this is not the case, an external GPS sensor is needed.

Remember to enable the Location Service under  Settings > Privacy > Location services > Select 'Air Navigation Pro', then set location to "Always"

From the app, go to Tools > Sensors > iOS Location Services (must be green).

From your Android device: Settings > Location > App permissions > Air Navigation > Allow all the time

From the app, check the Location Sensor. To do this, go to  Tools > Sensors > Location Sensors > Android Location Services (must be green).