• How your smartwatch measures distance may vary depending on what kind of exercise you’re tracking. • Walks, in particular, can rely on step data rather than GPS, resulting in potentially inaccurate figures.

Wearables like smartwatches are utterly packed with sensors, and in using them we gather all sorts of data. But just how accurate are all of those numbers? With some, like calories burned during an exercise, it makes sense that the figure’s just an estimate, and we shouldn’t expect it to be precise. Other numbers, like how many steps you’ve taken, we’d assume were exact figures. Which of those camps would you think distance measurements fall into?

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