How to find storage space used by Installed Apps on iPad

If your iPad are running iOS 4 version, you could only see a totla amount of space used by all apps on the device. Once you have updated it to iOS 5, you can find the storage space used by your installed apps.To do that, tap Setting > General > Usage. You can see how much space is used by every installed app. When you drill down on each app, you can see how much space is taken by its documents or