Well suited for an ordinary person to monitor activity. For sports, you probably need more serious gadgets. Sleep monitoring is not entirely accurate, it increases the value of sleep upwards. You woke up, turned around, even got up, but for the bracelet you are still sleeping. Also, if you woke up closer to the morning and were awake (conditionally) for about an hour, and then fell asleep again, the bracelet will not count the second period of sleep. May be important for people with floating sleep patterns.
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