Moon Almanac is described as 'Easy to use navigation keys create an animation of the Moon progressing through hourly, daily or monthly cycles'. There are four alternatives to Moon Almanac for iPhone, Android, iPad and Windows Phone. The best alternative is Sundroid. Other great apps like Moon Almanac are SunGuide (Paid), LunaSolCal (Paid) and MagicHour (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.