Solunar Time app for iPhone and iPad
Solunar Times gives you all the celestial information that you need at your fingertips. No data connection needed. Upon launching the app, calculations are made for Civil Sunrise (shooting light begins) and Civil Sunset (shooting light ends). Information can be recalculated at any time by pressing the Date Button.
If a data connection is available, locations can be chosen from the map and saved for recall later regardless of data connection availability.