Best fitness tracker: Learn what the best fitness tracker is here
Not long ago, if we wanted to know our health metrics and conditions we had to make an appointment with a general practitioner or a specialist doctor, travel to the doctor's clinic or hospital, wait in the queue, do the prognostic tests and spent anywhere between one hour to a good five or six hours at the doctor's place before completing the test and the final prognosis by the doctor. Today, we can monitor many of these health and fitness metrics and conditions on the go, all year around, on our wrist for just a few hundred bugs.
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So true, @fit.zone. Sometime, you may have to spend the whole day at the hospital. In some countries, travel time too could take a long time. However, I am not sure how accurate these metrics measured by the trackers are.