Distance in kilometers
(Closer to 100% – better)
Like our steps, the distance indicates how far each wearable has traveled in one day. Since we can only wear two trackers on one individual wrist at any time for the most accurate result possible, we tested different wearables on different days, using the iPhone 6s Plus’ built-in Health app as the control factor. We did not feed the data from the wearables to the Health app, and each number came from their respective proprietary tracking apps.
We determine if the tracker is relatively more accurate by comparing its score to the day’s average score - an average of the trackers used and the iPhone 6s Plus. The TomTom Spark Cardio + Music tracker was only off the average score by 0.47 percent – the next closest is the Fitbit Blaze at 1.89 percent off the mark.