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Exclusive: We tested the world’s first automatic calorie counter, and it works!

Would you buy a car if it had no fuel gauge? A phone without a battery meter? As humans, we like to quantify the world around us, but until now we’ve lacked the tools to answer the simplest questions about how we’re powered: Are you eating enough? Are you eating too much? What’s in the food you ingest?

The Healbe GoBe Body Manager is the first device that can track what you put in your body without requiring you to ever glance at a nutrition label.

The GoBe told me precisely how many calories I’ve shoveled in, and how many I’ve burned. 

Using three sensors and a lot of complex math, the GoBe I’ve worn on my wrist for a week has told me precisely how many calories I’ve shoveled in, and how many I’ve burned. And I’ve checked it against box labels and other fitness gadgets. I had been prepared to jump onboard with the vocal critics calling the GoBe snake oil. I won’t: The last week has been a total life changer. Not only does it work, learning how many calories I eat and how many I burn each day has me thinking about food and exercise in a completely new way.

Sadly, the GoBe is also one of the buggiest, most frustrating devices I’ve ever used. Here’s an in-depth look at one of the most exciting, yet still deeply flawed, gadgets on the brink of hitting shelves.

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