Flight night time vs TwilightPro

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 algorithm to determine orthogonal distance and algorithm to determine sunrise or sunset. 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 app contains the default database. The source of data for it is openflights.org database. If the airport you need is missing you can create it in user's database.

TwilightPro calculates the night time, sunrise and sunset in-flight, between two points on earth defined either as airports or coordinates. The values of sunrise and sunset are adjusted with the altitude. There are selectable standard models for twilight, in order to obtain the times in function of the desired angular position of the sun below the horizon: official, civil, nautical, astronomical as well as values for Fajr and Maghrib recommended by Islamic Institutions. For situational awareness, there is the representation of the sun events on a map as well as tabulated. If desired, a toggle allows the user to see the flight progress and the variation of the times of sunrise and sunset through the route.