iPhone Pedometer Flawed Missing More than 1000 Steps Compared to Wrist Bands


iPhone Pedometer Flawed: The in built pedometer in iPhone which tracks the users steps is faulty, says a recent study. During the research done of University of British Colombia, the iPhone’s built-in pedometer missed about 1,340 steps during a user’s typical day when compared to a dedicated wrist-worn accelerometer. The iPhone was compared to the wrist band accelerometer and was given faulty.

33 participants were involved in the UBC study, which was divided into two parts i.e. a laboratory test and a test in regular living conditions. “In order to make accurate conclusions, we as researchers need to know that the data is actually representative of real behaviour,” said Mark Duncan, the study’s lead author. The researchers also provided another model to see if they can be different with the models.

iPhone Pedometer Flawed Giving Inaccurate Results:

The study found that, Personal iPhones underestimated steps by 9.4 per cent at the slowest speed of 2.5 km/h. The shared iPhone fared slightly better at 7.6 per cent. At faster walking speeds, the phones were off by less than five per cent, which is generally considered acceptable for a pedometer. For the other part of the study, participants fixed accelerometers to their waists for a full day, and recorded step readings from the iPhone at the beginning and end of the day.

Over three days, the iPhone underestimated the accelerometer data by an average of 21.5 per cent, or 1,340 steps per day. “The accelerometer in the iPhone actually does a pretty good job when tested under lab conditions,” said senior author Guy Faulkner. “You just have to have it on you at all times.”

Duncan however stressed that an average person shouldn’t be discouraged from using health apps for motivation. He added that people who are already tracking their steps, they can rest assured that if their phone says they’re getting the recommended 10,000 steps in a day, they are probably getting at least that many.

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