33: Fly to the Twilight Zone

Skyclock is a little app (offering both paid and free) for iphone which uses the phone’s GPS or network location service to calculate twilight periods for the present day virtually anywhere in the world.   It surely add some fun to the flightsim experience by matching the Civil, Nautical or Astronomical Twilight hours it displays.

Check it out from Skyclock or the App Store.

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