NOTE: Walk It Off only works on the iPhone 5s. Walk It Off is a clean, intuitive step counting app that uses the iPhone 5s' M7 motion co-processor to turn your iPhone into a pedometer and fitness tracker that automatically tracks the pounds (or kilos) you burn while walking, plus a whole lot more.Using the new low power M7 motion co-processor, Walk It Off is able to count your steps without draining your battery, even when your phone is locked and in your pocket. And Walk It Off doesn't just count your steps, it also tracks the number of calories and pounds you burn while walking, and the number of miles you walk. The very first time you use Walk It Off, it automatically loads the historical activity data already recorded by your phone to display your walking history for the past seven days. You'll immediately see how far you've already walked and how many calories you've burned, so you can start walking off the pounds today!