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![Amazon.com: Apple Watch Series 3 [GPS 38mm] Smart Watch w/ Space Gray Aluminum Case & Black Sport Band. Fitness & Activity Tracker, Heart Rate Monitor, Retina Display, Water Resistant : Electronics](https://m.media-amazon.com/images/I/71fwbMm1NBL._AC_SX342_.jpg "Amazon.com: Apple Watch Series 3 [GPS 38mm] Smart Watch w/ Space Gray Aluminum Case & Black Sport Band. Fitness & Activity Tracker, Heart Rate Monitor, Retina Display, Water Resistant : Electronics")
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Polar H10 vs Apple Watch Heart Rate Monitor | by Ugur B. | Medium
Apple Watch Series 1 RunnerClick
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