Zombies, Run: This app makes running fun again. This immersive running game helps you get fit while you escape zombies and save the lives of hundreds of people that are depending on you. As you run, you’ll listen to the adventure co-created by award-winning novelist Naomi Alderman. There are 33 missions in the first season, seven in the second, and a whopping 120 missions available for purchase.Switch on Zombie Chase mode to increase your speed with intervals. Then check your fitness and game stats with the in-app graphs.