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Go Green - Iphone helth app
1) Walk, it will track how much you walked, your speed, calories lost and some points for walking.
2). When you drive, it tracks driving distance per trip (allows you to start and stop the trip), your average speed, alerts when you cross a certain speed limit which can cause effect on mileage. If you start and stop your trip at very small distance, it will tell you that you should have walked
