Understanding how these measurements are captured helps you trust the numbers and make meaningful changes to your habits. When the watch senses minimal motion for an extended period, it assumes you are asleep and begins logging that data.
Set Sleep Goals Apple Watch
Core Technology Behind Sleep Tracking The primary mechanism relies on the accelerometer, a motion sensor that detects movement throughout the night. A timeline breaks down the night into segments, showing wake-ups, time in bed, and estimated sleep stages if the hardware supports it.
Apple Watch has become one of the most trusted tools for tracking sleep, quietly analyzing your nightly routine to provide insights you can actually use. The watch does not just record sleep; it helps you build the conditions for better sleep.
Set Sleep Goals Apple Watch
The main metric is consistency, represented by how often you meet or exceed your duration goal. You can enable Sleep Focus, a Do Not Disturb mode that mutes notifications and dims the screen to encourage winding down.
More About How apple watch tracks sleep
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