My Vivofit 4 was fairly accurate initiallly, Now despite recording steps all day, it will give me 0 steps when I sync with my phone. It undercounts steps by the hunddreds, and the same walk that is 5 miles, has been recorded at anywhere from 4.8 down to 3.5.today. Seems the most inaccurate on cloudy days, or if I am wearing long sleeves? Anyone else seeing the same issues? And if so, is there a solution? I have not found one yet.
