New Delhi, Aug. 16 -- Heart-rate tracking is now a standard feature on most smartwatches, but its usefulness depends on how accurately the watch captures changes in your heart rate. This matters during workouts, but it can also be useful for tracking your heart rate throughout the day.

Modern watches use a combination of sensors and software to collect this information. The five watches covered here take different approaches to health and fitness tracking, with some designed for everyday use and others for serious training.

This list focuses specifically on their heart-rate tracking capabilities while also considering how each watch fits into everyday health and fitness tracking. The aim is simple: to identify the smartwatches that offe...