The Photographer's Ephemeris - TPE is a tool to help you plan outdoor photography in natural light, especially landscape and urban scenes. It is a map-centric sun, moon and milky way calculator: see how the light will fall on the land, day or night, for any location on earth.
Lumy - Helps you track photographic times
SunCalc - Find out where the sun will be at any time in any location
Alpenglow - Never miss a incredible looking sunrise or sunset again
Sun Surveyor - Sun Surveyor calculates Sun and Moon Positions, Sunrise & Sunset and Moonrise & Moonset...
Sundial App - Sun & Moon times and alerts for iPhone, iPad, & Apple Watch