FITNESS SLEEP TRACKER NO FURTHER A MYSTERY

Are fitness trackers exact? The precision of step counts and heart charge monitoring has improved radically in the last a decade, and all major-name fitness trackers, and those on this checklist, can be thought of precise.????? ??????????? ????????? ??????? ?????????? ???????????? ???????, ???? ????? ???????????? ????? ??? ?????????? ?????, ???????