A fitness tracker or smartwatch with sleep tracking can offer valuable ... (apart from the Fitbit Charge HR and Fitbit Surge) are designed to track sleep stages and to give you graphs showing daily, ...

But it’s clear from the Oura Ring’s graph that from May, this started to reduce, falling to a low of just over six hours by September. My sleep efficiency ... of wearing a smartwatch, smart ...

The Honor Watch 4 smartwatch has 12 professional ... with intricate graphs showing me how much deep sleep, light sleep and REM Sleep I’ve had each night. I also get a sleep overview every ...