Continuous Heart Metrics

Resting rate and variability read differently at three in the morning.

Blood Oxygen Sensing

Overnight oxygen readings surface patterns a daytime spot check misses.

Skin Temperature Trends

A small nightly shift can flag a change before you feel anything.

Long Battery Between Charges

Health data has gaps if the ring spends the evening on a charger.

All-Day Wear Comfort

A sensor only records what it is on your hand to see, including at night.