In strength training and weightlifting, selecting a tracker means prioritizing metrics that reflect true effort, quality of movement, and progressive overload. This guide explains how to identify devices offering reliable force estimates, rep-by-rep tracking, grip strength proxies, and data you can trust for programming decisions. You’ll learn how to interpret bar speed, volume, eccentric control, and fatigue signals while considering form, comfort, and battery life. With these insights, you can compare models, avoid vanity metrics, and tailor metrics to your unique training goals, ensuring that the device becomes a useful partner in steady gains.