New Delhi, Aug. 12 -- A smartwatch is no longer a fashion accessory that can count your steps, ring an alarm or show you notifications. Modern smartwatches are not just mini mobile phones, they are also compact health trackers. Among others, these smartwatches come with heart-rate monitors. This feature is useful for tracking workouts, resting heart rate and changes in your daily activity. That said, if accurate readings are important to you, simply choosing a smartwatch with a heart-rate sensor may not be enough.

Smartwatches available in the market right now use improved sensors and smarter algorithms to deliver more reliable heart-rate data, even during workouts and other demanding activities. Some also offer continuous monitoring, EC...