the info, it is in the website, you do have to dig a bit though. The program replaces - & I am sure is more accurate - than a rotating wheel calculator last made decades ago, and adds features like the time the sun will shine through a window on a given day. For pricing, go to the "store". Howver, you should know that if you already own a version of Starry Night you can get much of the same info, plus moon rise/set.