Suntimes is described as 'Android app (and widget collection) that displays sunlight and moonlight times for a given location' and is a Alarm Clock in the os & utilities category. There are more than 10 alternatives to Suntimes for a variety of platforms, including Android, Web-based, iPhone, Android Tablet and iPad apps. The best Suntimes alternative is Fossify Clock, which is both free and Open Source. Other great apps like Suntimes are Morning Glory, timeanddate.com, Sunlitt and MA Clock.
Solartopo provides global sunrise, sunset data with topographic analysis, precise solar orbit services calculating azimuth and zenith angles, solar cell alignment advice, and hilly terrain sun-exposure finder. Calculations consider time zones, light refraction for future predictions till year 6000.
