fitbit update 4.1
fitbit update 4.1
Fitbit OS 4.1 update rolling out to all 
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Fitbit OS 4.1 Update Improves Heart 
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Fitbit OS 4.1: Always-on display, new 
OS 4.1 brings a slew of upgrades 
Fitbit OS 4.1 Is Coming On December 3 Fitbit OS 4.1 - Firmware Release
FitbitOS 4.1 update starts rolling 
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Fitbit announces upcoming OS 4.1 update 
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