The New York Times personal tech columnist tracked his sleep for two weeks with an Apple Watch and some software. Here’s why he concluded it was a pointless exercise.

Ultimately, the technology did not help me sleep more. It didn’t reveal anything that I didn’t already know, which is that I average about five and a half hours of slumber a night. And the data did not help me answer what I should do about my particular sleep problems. In fact, I’ve felt grumpier since I started these tests.

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