This manual press on the Up helps the app to know when you first lie down in bed, so it can measure how long it takes for you to fall asleep.

WSJ: A Health Monitor to Nudge You as It Keeps Watch

When I fall asleep at night, I turn away from gazing at my husband beside me to gaze upon the faces of our children, in plain silver frames on our bedside table (that is, unless one of the three of them has decided to invade our bed, in which case I am gazing at their faces from far too close up).

WSJ: Family Photos: Hide or Show?

He is also developing light-delivering goggles that are supposed to help people reset the circadian rhythms that govern when they nod off and wake up, so they fall asleep faster and stay asleep longer.

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