Cardiio, Inc. has Cardiio – Heart Rate Monitor, 7 Minute Workout, Calorie Burn Tracker (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly $1.99) for a limited time.

Cardiio helps you measure your heart rate, learn how the numbers relate to your health, perform effective workouts to get in shape, and track your progress.