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Pillow

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description Pillow Overview

Pillow is an application that uses your smartphone’s microphone to passively record sounds throughout the night, analyzing them to estimate sleep stages like light, deep, and REM sleep without requiring you to wear any devices.

help Pillow FAQ

Can Pillow track sleep without a smartwatch?

Yes, Pillow can use the smartphone's microphone to passively record nighttime sounds without requiring a wearable device. It analyzes those recordings to estimate sleep stages such as light, deep, and REM sleep.

What does Pillow listen for during the night?

The app analyzes sounds captured by the phone's microphone, such as movement-related noise or other nighttime audio. Its purpose is sleep analysis, so the resulting stage information is an estimate rather than a clinical diagnosis.

Does Pillow measure sleep stages like REM and deep sleep?

Yes, Pillow presents estimates for stages including light, deep, and REM sleep. Because the app relies on a smartphone microphone rather than a full clinical sensor setup, those stages should be interpreted as consumer sleep-tracking estimates.

Can Pillow be used with Apple devices?

Pillow is associated with the Apple ecosystem and is designed around iPhone-based sleep tracking, with support for Apple Watch workflows in compatible versions. The smartphone microphone method is the key feature when no watch is being worn.

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