“What features does the 4 offer that the 3 does not? I can't seem to really discern that from specs.”
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Charge 4 has the following additional features: * Built-in GPS vs Charge 3 has to use your phone * Built-in NFC to use Fitbit Pay and future features * HRM tracks Active Zone Minutes to help know when you are in burn mode. * More advanced Sleep Tracker with optimal wake time notification and more * Spotify controls * Slightly larger screen but bands are interchangeable
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