This ring watch squeezes in heart rate, sleep, and fitness tracking

At $50, the Rogbid Fusion is cheaper than other less functional ring watches. | Image: Rogbig

It's not a household name, but Rogbid has been churning out budget-friendly smart wearables for around a decade. Its latest creation capitalizes on the recent trend of functional ring watches, but unlike Timex and Casio's wearables that don't do much more than tell time, the Rogbid Fusion includes smart functionality like fitness tracking, heart rate and blood oxygen measurements, and sleep monitoring.