Starfield 3D for the iPhone
I originally made Starfield 3D an iPad-only app because it was the only iOS device that I owned that had a compass. But fortunately, I have friends with more modern devices and so I spent a little time turning it into a universal that now works on iPhones and iPod Touches.
If you’ve got a more modern iPhone than I have (like, it can run iOS 4.0), then check it out! It’s free!