Android: We're fans of the story-driven exercise game from the creators of Zombies, Run! Superhero Workout for iOS, and now it's available on Android.
Similar to Zombies, Run!, Superhero Workout incentivises you to work out by dangling a story in front of you. The more reps you do, the more story missions you unlock.
It tracks your workouts by using motion tracking tech on your device's camera. Just place your Android device in front of you and follow the on-screen instructions. Superhero Workout uses variations on the popular 7-minute workout to help you get in shape, but each workout is different enough to keep things interesting.
Superhero Workout ($3.39) [Google Play]