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Self-Tracking Apps To Help You 'Quantify' Yourself

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Noah Zandan shows off his Zeo sleep-tracking headband. His other self-tracking devices are on his wrists. Noah and his father, Peter, are both part of the growing "Quantified Self" movement. (NPR)
Noah Zandan shows off his Zeo sleep-tracking headband. His other self-tracking devices are on his wrists. Noah and his father, Peter, are both part of the growing "Quantified Self" movement. (NPR)

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