Sleep Well Diary - Sleep Log

No wearable, no phone-on-the-mattress sensor tracking. Sleep Well Diary is a dead-simple manual sleep diary you fill out in 30 seconds each morning.

■ A 3-step log
Dial in your bedtime and wake-up time and your sleep duration is calculated automatically (midnight rollover handled for you). Rate last night's sleep quality with a 5-level emoji scale, tap to add lifestyle factor tags — caffeine, exercise, stress, nap, alcohol, late-night snack, screen time, and more — then add an optional one-line note. Done.

■ Everything at a glance on Home
A circular gauge shows last night's sleep time against your goal, a streak card tracks your logging streak, and a 7-day mini chart shows your recent pattern instantly.

■ Monthly calendar
See a whole month of sleep quality at a glance with emoji markers on each day. Tap any date to view, edit, or delete that night's record.

■ Discover your own patterns with stats
Weekly/monthly average sleep time and quality trends, day-of-week patterns, and factor comparisons like "nights with caffeine vs. without" show exactly what affects your sleep. A sleep debt card tracks your cumulative shortfall against your goal.

■ Reminders that keep you on track
A bedtime reminder 30 minutes before your target bedtime, plus a morning logging reminder so you never miss a day.

■ Who it's for
- Anyone curious about their sleep quality who doesn't want a smartwatch or sensor-based tracking app
- Fans of the classic paper sleep diary recommended by sleep clinics, now digital
- Anyone who wants data-backed proof of how caffeine, late snacks, or exercise affect their sleep

■ Privacy-friendly by design
No sign-up, no login — every entry stays on your device, fully offline. Supports Korean and English, switchable anytime in Settings.

* This app is not a medical service. Displayed sleep statistics are for reference only and do not replace professional medical advice or diagnosis.
* Contains ads (Google AdMob)