Marc Edwards compared a month's worth of results between the two devices. As you might expect, some days are more closely matched than others, but overall the M7 chip and FitBit Zip performed pretty similarly.
iPhone M7 vs. the FitBit Zip
Marc Edwards compared a month's worth of results between the two devices. As you might expect, some days are more closely matched than others, but overall the M7 chip and FitBit Zip performed pretty similarly.