Samsung Gear S3 Smart Watch
Available in Classic and rugged Frontier guise, Samsung’s Gear S3 smartwatches have a gorgeous circular AMOLED display, intuitive Tizen OS interface, and one of the best sets of fitness-tracking features around. The latter include a heart-rate sensor and built-in GPS. The frontier model you see in this image even has a built-in altimeter. All the fitness data captured by the watch is neatly organized in the S Health app.