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Loop Polar
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app for auto syncing weight to Polar Flow : r/Polarfitness
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Polar Fitness suspends its global activity map after privacy concerns - The Verge
Can I connect a Fitbit to an external heart rate monitor?
Solved: Fitbit app + polar h10 chest strap - Fitbit Community
Polar Vantage V vs Fitbit Versa 2 (Fitness watches go head-to-head) - ThreadCurve
