I came upon this application not for naviagtion per se, but as a photographer, I want to know where and when the sun and moon will be in the sky relative to my poistion so that I can compose my photographs ahead of time, knowing where I need to be to get the sun or moon behind a given landmark. There are no other apps that I have found that do this. Some will tell you the time and azimuth of the rise and set of the sun or moon for a given day, but then you have to get out a paper map and see what this means in terms of your composition. With astro compass, it uses gps to place you on a local map. The azimuth and elevation of the sun and moon are shown relaitve to your current position, and it will graphically simulate where the sun and moon will be in the future -- I think up to 30 days in the future.

The basic idea is amazing, I agree with the person that says it is great for photographers, you don't need to understand much astronomy. Can't wait to use it on a scouting. The interface needs a lot of work, it is hard to move the time of the day, I would like some info on altitude somehow. Also, getting the Satelite view would be amazing, specially when scouting outside of the city. Of course setting a point in time/space would be great for planning shootings too. I hope lives up to its potential so I can re-review and give it 5 stars.

This is worthless. It says it is compass and IT IS NOT!!! Don't waste your money. I'm pissed off.