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Luffu co-founders Eric Friedman (left) and James Park (right). Photo: Luffu

Two years after exiting Google, the co-founders of Fitbit are launching their next act: an AI-powered service for monitoring the health of one's entire family.

Why it matters: After helping turn personal health tracking into a mass habit at Fitbit, James Park and Eric Friedman are betting the next big shift is shared health, tapping AI to help ease the heavy mental load of caregiving.