SunSimulator 太陽の方位と高さ app for iPhone and iPad
This application simulate direction and altitude of the sun.
It uses GPS location and the clock of iPhone.
At first launch latitude and longitude is 0. So tap GPS button to set present location to SunSimulator.
Tap global button and you can change the location using Google Map.(Google Map needs internet connection.)
Tap clock button and you can set the time to calculate sun altitude and direction.
Rotate your iPhone, and you can see global map displaying night area and various graphs about move of the sun.