Apple's default water droplets wallpaper for your iPad is pretty cool, but you might get a bored of it after a while. Here, we show you how to change the wallpaper on your iPad, and round up the best wallpaper apps to help you choose a new one.Related StoriesAre cheap, unofficial non-Apple iPhone chargers safe?Ashton Kutcher confesses he was "terrified" about playing Steve JobsHow to get Flash on iP