Sleep Tracking#

Sleep as Android uses advanced algorithms and your device’s sensors to provide a detailed window into your nightly rest.

Use this chapter to learn how to start tracking, explore your tracking screen controls, and discover every setting and sensor option available in the app.

App Settings & Guide Breakdown#

Looking for a specific toggle or option in your sleep tracking settings?

• Sleep Tracking Guide & Settings: A complete guide to starting sleep tracking, positioning your phone (accelerometer, sonar, wearables), using the tracking screen controls, and understanding every option under Settings ➔ Sleep tracking (including screen dimming, Do Not Disturb, stand-by, and battery optimizations).

Foundations & Sensors#

Learn about the technology and hardware that power sleep tracking:

• Sleep Tracking Theory: Learn about sleep phases (Deep, Light, REM) and how actigraphy works.
• Sensors Overview: Explore accelerometer, sonar, and wearable sensors in detail.
• Smart Wake-up: How the app finds the ideal moment to wake you up in light sleep.

Vitals & Health Monitoring#

Monitor your respiratory and cardiovascular health while you sleep:

• Breath Rate & Oxygen (SpO₂): Monitor your breathing rate and blood oxygen levels.
• Heart Rate Monitoring: Integrate real-time pulse and HRV data from your smartwatch or chest strap.
• Sleep Apnea Pre-screening: Identify potential breathing pauses and calculate your RDI score.

Tracking Features & Tools#

Customize and enhance your nightly sleep sessions:

• Automatic Sleep Tracking: Set the app to start and stop tracking automatically.
• Awake Detection: Learn how smart heuristics detect when you wake up during the night.
• Pair Tracking: Filter out your partner’s movements for a cleaner sleep record.
• Lullabies: Fall asleep faster with nature sounds, white noise, and binaural beats.
• Lucid Dreaming: Cues during REM sleep to trigger dream awareness.
• Sleep Goals: Set daily duration targets and build consistent sleep habits.
• Sleep Advice: Receive personalized recommendations based on recent sleep trends.
• Jet Lag Prevention: Light therapy and schedule shifts to manage travel fatigue.
• Sleep Time Estimation: Estimated sleep and fall-asleep timings.