CardioTrainer is your partner for weight loss & any fitness activity! Your app for walking, running, biking & other activities." better than any fitness app on the iPhone" Bob Tedeschi, New York Times. Free Weight Loss Trainer and Calorific diet add-ons make weight loss with your phone easy. Seamlessly tracks indoor/outdoor activities calories, GPS, pedometer. Integrated voice output & music player. Friend activity feed to motivate you. Workout schedule with reminders.