I'm trying to better understand smartwatches. Can someone explain what basic functions they have beyond telling time? I know many have activity sensors, but what data do they usually record exactly? I'm also interested in how they communicate with the phone—is it direct or does it need anything else? Let’s see if someone can shed some light with technical details without going on too long.
What is a smartwatch and what is it used for?
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So, A ver, I'm really intrigued by these activity sensors because I've never actually seen what specific data they show. Do smartwatches only track steps and calories, or do they also measure things like sleep or stress? And for the phone, is Bluetooth enough, or do I need to set up anything else?