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Synching Polar H10 heart rate to Fitbit : r/Polarfitness
Fitbit Versa review: A fantastic budget-friendly smartwatch
Polar H10 review: A tried and tested heart rate chest strap
Amazon.com: Fitbit Versa 3 Health & Fitness Smartwatch with GPS, 24/7 Heart Rate, Alexa Built-in, 6+ Days Battery, Black/Black, One Size (S & L Bands Included) : Sports & Outdoors