He had resumed eating and, with his mouth full, raised a fork, as if to say, You can see for yourself.

NEWYORKER: In Other Rooms, Other Wonders

Because the fork is in contact with only two parts of your body: your mouth and your hand, the device is successful at counting the number of fork servings during a meal.

ENGADGET: HAPILABS introduces HAPIfork (and spoon) smart utensils, brings metrics to your mouthfuls (hands-on)