I am avid user of the iPhone app FocalWare for calculating sun and moon positions, and though I'm not an Android user, I am impressed with a new app for that platform that was just shared with me by a photographer friend, Greg Harley (the author). It is called Shadowfacts. The app is currently listed in its beta form, with the final release imminent, but even in the beta version, he's incorporated a number of slick features like a built in compass, audible tone notifications for plotting position, etc. that show my software to be lacking.

You can check it out, download the beta or wait a little bit for the final version here.http://www.androidpit.com/en/android...adowFacts-beta