New Delhi, Sept. 29 -- With World Heart Day falling on 29 September, smartwatches are once again drawing attention to the health data they can collect from the wrist. The CMF Watch 3 Pro adds a new optical heart-rate sensor, 24-hour monitoring, sleep-tracking and the Activity Score, which is based on heart-rate data.

Nothing's sub-brand, CMF, released the Watch 3 Pro as the successor to the Watch Pro 2. It features a 1.43-inch AMOLED screen, dual-band GPS, Bluetooth calling, 131 sports modes, and a 350mAh battery. The watch is priced at Rs. 7,999 in India. After using it for a few days to track workouts, runs and sleep, here is how its health features performed.

One of the key features of the new CMF Watch 3 Pro is its new optical heart...