The same amazing Earth touring app found on the desktop, now spinnable via multitouch. Honestly if someone told me two years ago I would have a functional Google Earth app on my phone, I wouldn't have believed them. This is now.
From The App Related: Hold the world in the palm of your hand. With Google Earth for iPhone and iPod touch, you can fly to far corners of the planet with just the swipe of a finger. Explore the same global satellite and aerial imagery available in the desktop version of Google Earth. Including high-resolution imagery for over half of the world's population and a third of the world's land mass.