Flight night time

Great app for calculation of night flight time. This offline application enables pilots to determine their night flight time. All you need to do is just to set the place and time of departure and arrival. The app uses algorithms to determine orthogonal distance and sunrise or sunset times. The definition of night can be modified in settings according to user's national regulations. The Vincenty formula is used for calculation of distance. To calculate sunrise/sunset the Sunrise equation is used. The source of the default airport database used by the app is openflights.org. If the airport you need is missing you can create it in the user's database. Please send any comments to piotrsirko@gmail.com. iOS version is also available.