If you’ve had an iPhone or iPad for any length of time, you’ve probably accumulated a lot of apps that you no longer want to see in your list in the App Store for updating or in your iTunes account. You can delete an app from your iPhone/iPad by holding your finger on the icon until it wiggles and touching the black ‘x’, but that won’t remove it from your App Store list or iTunes account.
If you go into iTunes on your computer and delete the app from your Library, that won’t remove it from the list on your iPhone/iPad either. Actually you can’t fully delete an app from your iTunes account, whether it was free or you paid money for it. You can do something almost as good, though: you can hide the app through iTunes.