OnePlus is a Chinese company that makes Android phones, smartwatches and earbuds. Its Watch range combines notifications, sport, sleep and health summaries. Features differ between models, with newer watches adding temperature and cardiovascular wellness tools.

How it works
Optical sensors shine light into the wrist to estimate heart rate and blood oxygen. Motion sensors track steps, workouts and sleep, while satellite positioning records outdoor routes. Selected models use an additional finger contact during a short health scan and analyse pulse for arterial wellness estimates. The OHealth app presents trends and workout details.

Key considerations
Features vary by model, region and compatible phone, and some watches work best within the OnePlus ecosystem. Wrist fit, movement, skin contact and temperature affect readings. Arterial, stress and sleep scores are calculated wellness measures.