Initially Google Latitude was available as a web app, but now it is available for download as a native iOS a API. You can directly download it from iTunes App Store.For those of you who don’t know, Google Latitude helps you to locate where yours friends are. It helps you to keep in touch with your loved ones and friends by visually representing on a map The app runs in iOS 4 or later versions.
Google Latitude is available for iPod touch, iPhone 3GS and iPhone 4.0, as well as iPad. You can download it from iTunes App Store.
Here is the [Download Link]