If you're bored with running apps that simply cue you with your pace and mile markers, consider Zombies, Run! your rut-buster. The app drops you into an adventure story where you must gather supplies, run from the undead and, oh yeah, save humanity.
The app provides a mission to complete, which only running can accomplish, or you can create your own mission for interval training. Hear the drama unfold (and the groans of nearby zombies) through your headphones as you race through each mission.
The app has an adventure mode and a mode for training for a 5K.
Zombies, Run! is available on iOS and Google Android. A monthly subscription is required for $2.99, which provides access to one mission per week. The pro version, $19.99 per year, includes unlimited access to missions and interval training workouts.