Apple Watch goals: Polar launches Grit X smartwatch w/ up to 100-hour battery life, cardio and muscle load data, sleep tracking, more
Polar is out with a robust new smartwatch today built for serious athletes. The Grit X features military-grade construction, up to 100-hour battery life, cardio, muscle, and perceived load monitoring, sleep tracking, and more, giving a glimpse at some of the powerful features we hope to see arrive on Apple Watch someday.