Sleep Debt Clock
Know how much sleep you owe.
Download on theApp StoreRequires iOS 18.0 or later.
Think of sleep like a bank account. When you regularly get less sleep than you need, you build up “sleep debt,” and when you give yourself extra time to sleep, you can gradually recover.
One short night is easy to shrug off. A week of them adds up. Sleep Debt Clock reads the sleep already in Apple Health and keeps a running balance: every night under your goal adds to your debt, and every night over it pays some back.
Features
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Your balance at a glance
A debt ring shows where you stand (Well rested, Manageable, Elevated or High), plus last night versus your goal and your last 7 nights.
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Every night, in detail
Scroll through each night's surplus or shortfall, and tap any night to see how long you slept and how it changed your balance.
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Watch the trend
See your debt rise and fall over 30 days, 90 days or all time. Drag across the chart to check any day.
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Missing nights, handled
Forgot your watch? The app asks for an estimate instead of counting zero, and replaces it automatically if real data shows up in Health.
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Make it yours
Set your nightly sleep goal, choose the date tracking starts, and carry over debt you already had.
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Private by design
Only reads sleep data and never writes to Apple Health. No accounts, ads, analytics or servers.
Screenshots
What you need
Sleep data in Apple Health that includes Time Asleep. That comes from an Apple Watch worn to bed, or from any sleep-tracking app that saves sleep stages to Health. An iPhone's bedtime schedule on its own records only Time in Bed, which isn't counted.
Try it first
New to sleep tracking? Tap “Try with Sample Data” to explore the app with example nights while you wait for your own.
Sleep Debt Clock is for general wellness and information only. It is not a medical device and doesn't diagnose or treat any condition. If you have concerns about your sleep, talk to a healthcare professional.
Need help with Sleep Debt Clock?
Send us a question, a bug report or a feature request. You can also read the privacy policy.