If you’ve been thinking about investing in a wearable device to track your health, sleep and fitness, you’re most likely wavering between two options: a smartwatch or a smart ring.  Smart rings are still relatively new on the scene (compared to smartwatches, anyway), with big names being Oura, Ultrahuman, Circular, and more recently, Samsung. Meanwhile, some of our favourite smartwatches come from brands like Apple, TicWatch, Garmin, Withings, Fitbit, Samsung and Coros – and that isn’t even going into
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