Daily Sleep - Sleep Tracking

Daily Sleep is a sleep monitoring and analysis assistant for Apple Watch users. It's completely free and ad-free.

Daily Sleep is a sleep monitoring and analysis assistant for Apple Watch users. Sleep is crucial for everyone - not only should it be measured with scientific objective data, but your true feelings should also be valued.

• Do you often stay up late and want to monitor and improve your sleep habits?
• Getting enough sleep hours but still feeling tired during the day, not knowing what's wrong?
• Want to track long-term sleep trends and understand sleep regularity?
• Hope to see the entire month's sleep status at a glance through a calendar?
• Want to record sleep feelings and combine subjective with objective data analysis?
• Already own an Apple Watch and want to make better use of sleep monitoring data?
• Care about data privacy and don't want sleep data uploaded to the cloud?
• Dislike ad interruptions and need a clean user experience?

Whether you're a night owl, have poor sleep quality, or simply want to scientifically understand your sleep, Daily Sleep is your ideal choice. Daily Sleep helps you fully understand your sleep status through multi-dimensional data visualization analysis, while providing sleep diary to record subjective feelings. Completely ad-free, data stored locally, protecting privacy and security.

【Scientific Sleep Scoring System】

• Integrates multiple indicators including sleep duration, sleep stages, fall-asleep speed, restorative sleep, and sleep regularity to quickly understand sleep quality through scoring
• Detailed sub-score display: sleep duration, sleep stages, sleep latency, restorative sleep, sleep regularity - clearly pinpoint problem areas
• After waking up each day, open the app to view last night's sleep score, stage analysis, regularity assessment and other detailed data

【Stay-up-Late Monitoring & Recording】

• Set bedtime goal, automatically identify and mark each stay-up-late behavior
• Display sleep regularity intuitively through scatter plots, helping you say goodbye to bedtime procrastination
• Sleep time regularity assessment to understand schedule stability

【Sleep Calendar with 6 Viewing Modes】

• Display entire month's sleep status in calendar form, marking sleep quality with different colored icons
• Switch between 6 viewing modes: sleep status, score, duration, bedtime, wake time, sleep latency
• See long-term trends at a glance, quickly discover sleep patterns and problems

【Continuous Data Trend Tracking】

• Weekly sleep bar chart: Shows score changes for the past 7 days, click any date to view details
• Monthly sleep line chart: Displays best/average/worst score baselines to understand overall trends
• Monthly sleep duration statistics: Shows longest/average/shortest sleep to assess sleep stability
• Sleep regularity scatter plot: Shows bedtime and wake time distribution, intuitively see regular or irregular schedules
• Track sleep change trends continuously for more effective understanding of sleep improvement

【Sleep Diary Recording Subjective Feelings】

• Record daily sleep feelings, dreams, and thoughts (up to 500 characters), combining objective data with subjective feelings
• Custom color tags to mark special days, displayed visually in calendar
• Discover connections between sleep and life events, find root causes affecting sleep

【Effortless Data Monitoring】

• Syncs with Apple Watch and Apple Health automatically, no manual operation needed
• Supports syncing historical data (180 days or 2 years), just wear watch to sleep for automatic recording

【Completely Ad-Free】

• No ads from start to finish - no banners, no pop-ups, no soft placements, no payment prompts, pure user experience

【Data Privacy & Security】

• All data 100% stored locally, not uploaded to any server
• Free, pure local storage, no uploads, ready to use
• No account registration required, authorization can be revoked anytime, your sleep data belongs only to you