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. Handy for astronomy, photography, outdoor activities, planning gardens, holidays, hunting, and' and is an app in the education & reference category. There are six alternatives to Sundroid for a variety of platforms, including iPhone, Blackberry, Windows Phone, iPad and Web-based apps. The best Sundroid alternative is LunaSolCal. It's not free, so if you're looking for a free alternative, you could try Solartopo or SunSeek. Other great apps like Sundroid are SunGuide, MagicHour and Moon Almanac.