If there are two things for certain in this messed-up world of ours, it's that 1) zombies love brains and 2) people with iPhones and iPads love zombies. Fortunately, the App Store is loaded with undead-themed apps to help everyone prepare for the impending zombie apocalypse, no matter how it comes (virus, drug experiments, aliens, etc. ). Make sure you pick up these apps to ready yourself.