KoreTrak watch Save $49.96) Apple Watch Series 3 (GPS, 38mm) — $169.00 (List Price $199; Save $30) *Deals are selected by our partner, TechBargains Fitness Tracker vs. Smartwatch Unless you want a gadget on both of your wrists (not the best look, in my opinion), you'll want a smartwatch that can do double duty as a fitness tracker—or any other wearable gadget you were thinking about getting. Most smartwatches are capable of tracking basic activity, like steps, but you need to pay close attention to any additional features. ADVERTISEMENT The Apple Watch Series 5, for instance, features GPS, so it can track your runs without the help of a companion device. It also has a heart rate sensor. Not only that, but an ECG function allows you to generate a PDF of your heart rhythm you can share with your doctor. .