SleepLedger is an iPhone app that reads your sleep data from Apple Health to calculate your accumulated sleep debt and generate a personalized recovery plan with nightly bedtime recommendations.
SleepLedger reads sleep analysis data from Apple Health. This data is recorded by your Apple Watch, iPhone, or third-party sleep tracking apps that write to Apple Health.
Sleep debt is the cumulative difference between the amount of sleep you need and the amount you actually get. SleepLedger calculates this over a rolling 14-day window. For example, if you need 8 hours but sleep 7 hours for 3 nights, your sleep debt is 3 hours.
No. SleepLedger provides general wellness information and is not intended to diagnose, treat, or prevent any disease or health condition. Please consult a healthcare professional for medical advice about sleep disorders.
SleepLedger reads sleep analysis (duration, stages, in-bed time), heart rate, and heart rate variability (HRV) from Apple Health. It does not write any data to Apple Health.
No. SleepLedger works with iPhone-only sleep data. However, an Apple Watch provides sleep stage breakdowns (Deep, Core, REM) and heart rate/HRV data for more accurate quality-weighted calculations.
When sleep stage data is available, SleepLedger weighs Deep sleep (1.5x), REM sleep (1.3x), and Core sleep (1.0x) to produce a quality score. HRV data adds a recovery bonus. Higher quality sleep reduces your effective sleep debt.
Yes, completely. All data is processed and stored entirely on your device. There are no accounts, no servers, no analytics, and no tracking. Nothing is ever uploaded.
Premium unlocks quality-weighted sleep debt calculation (using HR/HRV data), the medium home screen widget, CSV data export, and the weekend catch-up planner.
Premium is available as a monthly subscription, an annual subscription, or a one-time lifetime purchase. The lifetime option has no recurring fees.
Yes. Go to Settings and your purchase will be automatically restored through the App Store using your Apple ID.
All purchases are processed by Apple. To request a refund, visit reportaproblem.apple.com.
SleepLedger requires iPhone running iOS 18.0 or later. iPad is not supported.
Yes. SleepLedger works entirely offline. No internet connection is needed at any time.
You can manually add or edit sleep records within the app. Manual records override HealthKit data for the same date. You can also check Apple Health to verify your source data.
Yes. You can ask Siri to check your sleep debt, get tonight's recommended bedtime, or get last night's sleep summary without opening the app.
We're happy to help. Check our contact page to get in touch.