DotSleep vs Fasting Window

DotSleep helps you understand your real energy state and make better sleep decisions — not just by counting hours, but by tracking your cumulative sleep debt, fatigue score, and nightly recovery quality. Fatigue Score, Sleep Debt, and Sleep Score DotSleep uses a sleep debt based fatigue algorithm to estimate your current fatigue level, calculate your sleep debt balance, and show a Sleep Score that explains how well each night supports recovery. Personalized Bedtime Suggestion Based on your fatigue level, sleep debt, target wake time, and sleep latency, DotSleep gives you a personalized bedtime suggestion each night so you can recover proactively. Today’s Overview See your current fatigue level (Energized / Normal / Mild / Moderate / Severe), sleep debt balance, recent sleep summary, and tonight’s suggested bedtime at a glance. History and Daily Details Review your full sleep log, 7-day trend chart, and daily detail view with sleep stages from Apple Health, including Core, Deep, and REM when available. Sleep Trends That Reflect Real Schedule Drift Trend charts now position sleep bars by actual bedtime and wake-up time, making it easier to spot late nights, early nights, and shifts in your routine over time. Monthly Sleep Report Get a monthly summary of your sleep, including sleep debt breakdowns, fatigue trends, key highlights, and achievement progress to help you stay consistent. Apple Watch Check your fatigue on your wrist, review synced data, and log sleep directly from your watch with updates sent back to your iPhone. Home Screen Widgets Show your fatigue score, Sleep Score, and tonight’s bedtime suggestion on your Home Screen or Lock Screen for quick daily awareness. HealthKit Integration Automatically imports sleep data from Apple Health and merges it with manual entries, reducing duplicate logging and keeping your history cleaner. Sleep Knowledge Base Read science-backed articles on sleep debt, fatigue, deep sleep, REM, circadian rhythm, and recovery habits to better understand your sleep. Smart Reminders Bedtime prep, sleep, and morning log reminders help you build a more consistent routine over time. Premium Features Unlimited sleep articles, with more added over time Monthly sleep reports with trends, targets, and sleep debt breakdowns Achievement system with 20 badge types Apple Health sleep import Home Screen and Lock Screen widgets iCloud backup and restore Available as monthly, yearly, or lifetime plans. Privacy Your sleep data is stored locally on your device. iCloud sync and Sign in with Apple are supported, so no extra account is required. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Record your own fasting times, without an account. YOUR TIMES IN ONE WINDOW - Read your planned time to eat again, with its date - Correct an active start within the past 24 hours - Choose no goal to record elapsed time without a planned time - Keep your selected 16:8, 18:6, 20:4, OMAD or Custom preset (Custom is saved as 16 hours) - Receive a reminder at your chosen goal, when notifications are allowed - End at any time, including before your chosen goal KEEP YOUR RECORDS - See actual lengths and summaries from your last 90 records - Correct the end time of records that ended within the past 24 hours - Existing local records and settings are preserved SAFETY INFORMATION This is a time record, not a medical tool. It does not measure metabolism or provide medical advice. Goals are personal settings, not recommendations to fast longer. Talk with a healthcare professional before considering fasting, especially if you are under 25, pregnant or breastfeeding, take insulin or diabetes medicines, take medicines that require food, have a seizure disorder, work night shifts or operate heavy machinery. If you have or have had an eating disorder, avoid fasting and consult a healthcare professional. If you feel unwell, stop regardless of your goal and seek professional advice. Sources: NIH News in Health, To Fast or Not to Fast, December 2019; https://newsinhealth.nih.gov/2019/12/fast-or-not-fast Johns Hopkins Medicine, Intermittent Fasting: What is it, and how does it work?, updated April 7, 2026; https://www.hopkinsmedicine.org/health/wellness-and-prevention/intermittent-fasting-what-is-it-and-how-does-it-work