Auto Sleep Detector & Tracker

Understand when you may have slept—even if you forgot to start a timer.

Sleep Detector notices how long the app has been away. When you return after a long interval, it creates an editable sleep estimate for review. App-away time alone is not treated as proof of sleep: low-confidence estimates always wait for your confirmation.

For more context, optionally connect Apple Health and the Apple Watch companion. Sleep stages and selected recovery signals can refine a candidate; only periods you confirm are written back to Health when sync is enabled.

REVIEW BEFORE SAVING

• Inspect estimated start and end times
• See confidence and evidence details
• Edit, confirm, or dismiss each estimate
• Review history, trends, and daily wellness context

APPLE WATCH + HEALTH

• View last night's duration and stages on your wrist
• Refresh on demand—no continuous sensor workout
• Read Health data only after permission
• Write only confirmed sleep periods
• Avoid duplicate Health entries

PRIVATE BY DESIGN

• No account
• No advertising or tracking
• No cloud sleep profile
• On-device storage and analysis
• User-initiated JSON and CSV export

BATTERY CONSCIOUS

Sleep Detector records lightweight app lifecycle timestamps instead of running a continuous background sensor session. iOS may suspend apps; the estimate is completed when Sleep Detector is reopened.

Sleep Detector supports awareness and journaling. It is not a medical device and does not diagnose sleep disorders. Results depend on available evidence and user confirmation.