Fitbit’s Charge 4 can wake you up when you feel well-rested

Fitbit’s Charge 4 can wake you up when you feel well-rested
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You now have more reasons to wear your Fitbit Charge 4 around the clock. The 9to5Google team reports (via The Verge) that a Charge 4 update has introduced two major features to improve your sleep hab…
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