There are no shortage of apps that track your workouts and update your progress towards physical goals, but Runnit, a new app for the iPhone, wants to reward users with discounts, free products, and exclusive content for your workouts. The user sets goals by choosing rewards from the store, and the app tracks your progress towards the reward. Depending on the reward, the level of workout will respectively vary. As you progress, the app encourages you to push onwards. It’s an interesting concept, and a new spin on what is now an established genre of app; how the app continues to function by offering promos without any demonstrated profitability, though, will be interesting. In that vein, if it proves successful it could be a proving ground for different forms of native advertising.