Red gaps in the sleep graph#

Red gaps (or red vertical bars) on your sleep graph indicate periods where the app was unable to collect sensor data.

If the red gaps are large (hours long), the Android system likely killed the app in the background to “optimize” memory or battery.

👉 Fix: You must exclude Sleep as Android from battery optimization. Visit DontKillMyApp.com for manufacturer-specific steps.

If you track with a smartwatch, red gaps mean the Bluetooth connection between the watch and phone was lost.

👉 Fix:
- Ensure your watch companion app (e.g., Galaxy Wearable, Zepp, Garmin Connect) is also excluded from battery optimization.
- Keep your phone within Bluetooth range (usually the same room) throughout the night.

If using Sonar or the Accelerometer, physical movement or environmental noise might have interrupted the signal.

👉 Fix: Check your Phone Placement and ensure the phone is on a stable surface.

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