06.03.2014 15:05 Uhr, Quelle: Engadget

Jawbone's 'Up Coffee' app tracks your caffeine intake, estimates when you'll finally be able to sleep

Ah, caffeine. So addictive. So energizing. So unhealthy. It's no secret that coffee lends itself to spurts of early-morning productivity, only to be followed by mid-afternoon slumps. And yet, we're somehow always surprised when that 4PM frappuccino

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