Zombies Run! 5K Training

Six to Start's "Zombies Run! 5K Training" for Android and iOS is a workout companion app that's sure to add some zing to training sessions.

Widely described as the "world's most successful smartphone exercise game," the app's 8-week training regimen is designed to help beginners clear a 5 kilometer distance - literally guiding its users with detailed instructions on when to walk, jog, sprint or stretch though real-time voice cues.

What's more, the app also "tells" its users a story that'll keep them on their toes while going through the app's training module.