The new Halo tracker adds a display and Amazon-powered fitness and nutrition services no one asked for.

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The Amazon Halo combines the familiar fitness-tracking features with some radically invasive-feeling innovations.

Amazon's Halo subscription service also adds video workouts and nutrition, coming at the end of the year.

That feature, Amazon Map Tracking, is now available to anyone in the U.S. who orders a package from the company and allows you to track Amazon packages in real time.