Why Apple’s next killer app is health

The Apple Watch will someday track your sleep, glucose levels, and more, just like it now counts steps and exercise minutes.

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Dan has been writing about all things Apple since 2006, when he first started contributing to the MacUser blog. He's a prolific podcaster and the author of sci-fi novels The Aleph Extraction, The Bayern Agenda, and The Caledonian Gambit.
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