An Apple ID is used on the iPad, and all iOS devices, to sign in to all the built-in stores – the App Store, iTunes, and the iBookstore. You need an Apple ID in order to download and install apps, songs, movies, and books on the iPad.
One of the most common questions I see on iPad discussion forums is how to change the Apple ID on the iPad. It’s a very easy thing to do. Here’s how:
— Open the Settings app
— Scroll down the sections in the left sidebar and tap on ‘iTunes & App Stores’ (if you are running an older version of the iPad operating system than the current iOS 6, then this section will? just be labeled Store).
— Then you’ll see the iTunes & App Stores screen in the main window on the right. Right at the top of that screen will be a bar saying ‘Apple ID: username’ (with whatever the current Apple ID is where I’ve said username). Tap on that bar.
— That will bring up a popover menu. Tap on the ‘Sign Out’ button on the popover.
— That will take you back to the iTunes & App Stores screen, but now with the Apple ID and Password fields blank. If you have an existing Apple ID you want to change to then fill in those fields and tap on the Sign In bar. If you want to create a new ID just tap on the Create New Apple ID bar and follow the on-screen prompts.
That’s all there is to changing your Apple ID on the iPad. You can also sign out and sign in with a different ID in the App Store. In the Featured area you scroll all the way down past featured apps and quick links and look for the Apple ID bar. Tap on it to bring up the option to sign out.