Nexercise is a free iPhone application that tracks activities ranging from running and weightlifting to fencing and polo and rewards users with free and discounted merchandise in the hope that users will adopt long-term exercise habits, Reuters said. Users can accumulate points based on the length of their workouts and for other actions that reinforce frequent exercise habits. Exercising with a friend or on a rainy day, for instance, allows users to accumulate bonus points. Receiving prizes is more of a lottery rather than direct redemption. Users with more points have greater chances of winning prizes, and those who have reached higher levels have access to more valuable prizes.