One of the many apps that is currently only available on iPhone 4G HD is iMovie. This app is just like the program on your computer and offers all of the same capabilities. You can even record clips at the last minute with your phone and add them into your Timeline. You can edit a whole movie in the palm of your hand - how cool is that? This app will NOT work on iPhone 3G, 3GS, 2G or iPod Touch, so do not waste your money if you haven't bought the new iPhone 4. Have fun!