Sundroid is described as 'calculates sunrise, sunset, twilights, golden hours, length of day, the path of the sun and moon, moonrise & moonset times and more for any date, anywhere in the world' and is an app in the Education & Reference category. There are four alternatives to Sundroid for iPhone, Windows Phone, Android, Blackberry and iPad. The best alternative is SunGuide. Other great apps like Sundroid are MagicHour (Paid), LunaSolCal (Paid) and Moon Almanac (Paid).
SunGuide provides a quick view of this week's solar events. The application provides times for sunrise, sunset, and twilight start/end instantly. Unlike other similar apps, an Internet connection is never required.