Contact-Free Measurement

A pad under the mattress or a bedside sensor records without anything worn to bed.

Heart Rate and Breathing

Stage estimates lean on heart rate and breath pattern rather than movement alone.

Full-Night Battery Life

A tracker that dies at three in the morning leaves half the night unrecorded.

Trend History Across Weeks

One night means little, while a month of data shows what actually changes sleep.

Snore and Movement Logs

Snoring and restlessness explain morning tiredness that a total sleep time hides.