How can I delete a ghost / duplicate app on my iPhone?

A "ghost" app occurs sometimes when an app gets stuck installing on your iPhone or iPad and a duplicate app icon is created on your Home screen. These icons normally cannot be removed by the traditional technique used to delete apps. Luckily there is a very simple solution to the problem. Just simply restart your iPhone and the ghost app will disappear. If this does not work, you may want to try these other suggestions.