Sometimes if you leave it sitting somewhere subject to a lot of vibrations, such as on a table next to a fan, these vibrations can be interpreted as steps.
Best AnswerMine does the opposite, it undercounts by about 15-18% which is really frustrating. Luckily the gps tracker tracks the distance accurately so I know how far I have walked but my step count is out by about 4000 steps per day and that annoys me!
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