Sleep apnea

The meaning of sleep apnea is fairly literal. An apnea is a pause in breathing, and sleep apnea is a disorder in which those pauses repeat through the night. The common form is obstructive. Muscle tone drops as you fall asleep, the soft tissue in the throat collapses inward, and the airway closes while the chest carries on trying to pull air through it. Oxygen falls, carbon dioxide rises, and the brain triggers a brief arousal that restores tone and reopens the airway, often with a gasp or a snort. Then sleep resumes and it can happen again.

The person it happens to usually remembers none of it, because arousals that short do not get encoded as memories. What is left in the morning is unrefreshing sleep, sometimes a dry mouth or a headache, and a level of sleepiness that does not match the hours booked. On a tracker it tends to look like a fragmented night with elevated wake after sleep onset, which is one reason repeated nocturnal awakening with no obvious cause is worth mentioning to a doctor rather than filing under stress.

What sleep apnea means, and who can tell you that you have it

Diagnosis is a measurement, not an impression. It takes polysomnography in a lab, or a home breathing test recording airflow, effort, oxygen and heart rate, read by a clinician. No app can do this, Tock included. Tock’s on-device classifier labels snores, coughs and sleep talking and saves clips you can play back, which is a recording of noise and nothing more. It does not detect apnea, it does not screen for it, and it will never suggest you have it.

Where a recording genuinely helps is the conversation, turning “I think you stop breathing sometimes” into something you can describe. If your nights are broken and you want the everyday explanations first, why you wake up at 3am covers those.