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It should work on Android phones, but I'm not sure about iPhones. I'm using it on a Samsung A53. Yes, it tracks heart rates.
Sorry, there was a problem. Please try again later.The device has an optical heart rate sensor. If the phone you're using meets our Bluetooth requirements it will work. https://internalsupport.garmin.com/en-US/?faq=pvL8aWsaLU2iKyvF8VrpP9&searchQuery=Bluetooth%20requirements%20for%20fitness%20devices
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