Sleep trackers use your resting heart rate, heart rate variability and breathing data to estimate how long you sleep and how much time you spend in each stage.

Discover the best cheap smartwatches of 2026 featuring long battery life, fitness tracking, and smartwatch apps, perfect ...

Research published in the International Journal of Sensor Networks describes a new way to monitor human sleep that relies entirely on the Wi-Fi signals in the home. It promises an entirely ...

This smartwatch is the kind of device that does its job well, without making you wonder why you didn’t just spend hundreds ...

Overall this model was very easy to use, somewhat accurate for counting steps, and very good at measuring heart-rate accuracy. With recent version smartphones, our experts found it very easy to pair, ...

Overview: After a year of testing, this comparison reveals which Android smartwatch delivers the best balance of AMOLED display quality, battery life, fitness a ...

The Xiaomi Watch 2 performed well in terms of capturing our health and workout stats, but its dismal battery life and clumsy navigation let it down. It's not all bad, though: The large screen allows ...

Garmin's health and fitness smartwatch brings a number of upgrades, including a more premium design, built-in flashlight and running-specific tools RW verdict: The Garmin Venu 4 is a meaningful step ...