Wearables, which use photo sensors and accelerometers, generally overestimate sleep stages by misclassifying wake stages.

A round-up of the best smartwatches for anyone looking to stay on time while tracking their health, fitness, sleep habits, ...

I chatted with Fitbit's new Gemini-powered virtual fitness trainer for nearly 20 minutes, and it wasn't nearly as weird as I ...

Not interested in an Apple Watch? No problem. Check out the best Android-compatible smartwatches we've tested.