# Restmark: Sleep Debt Tracker — Your own sleep need, learned > Your own sleep need, learned (iPhone/iPad app by DAVIDE DOMINIK ROSSO.) - Source: https://appshunter.io/ios/app/restmark-sleep-debt-tracker/id6823312448 (this page in markdown: same URL + `.md`) - Developer: [DAVIDE DOMINIK ROSSO](https://appshunter.io/developer/6823312450) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 2 MB - Languages: American English - Released: 2026-10-28 - Data updated: 2026-10-31 ## What is Restmark? Restmark learns how much sleep you personally need and tells you when to go to bed tonight. It reads your sleep from Apple Health, keeps a running sleep debt, and plans bedtimes around your wake-up time and sleep cycles. Everything is calculated on your iPhone. No account, no ads, no tracking. YOUR SLEEP NEED, LEARNED Restmark looks at your free nights, when you slept in well past your usual wake time or on a weekend or day off, and estimates how long you sleep when nothing cuts it short. Until it has enough free nights it uses a default and shows that it is still learning. You can also set a custom sleep need. SLEEP DEBT Each morning Restmark updates a running sleep debt: short nights add to it, extra sleep pays part of it back, and older nights gradually count less. Today shows your debt with a Low, Moderate or High label, how it changed versus last week, and a recovery forecast. TONIGHT'S BEDTIMES • Ideal Bedtime: your wake-up time minus your sleep need, a share of your debt and the time you usually take to fall asleep. • Latest Bedtime to Stay on Track: the latest you can go to bed tonight without adding sleep debt. READINESS AND CONSISTENCY • Readiness (0–100) compares heart rate variability during sleep and resting heart rate with your own 30-day baselines, plus last night's sleep against your need. Nights without HRV, such as many Fitbit nights, are scored on sleep alone. • Consistency (0–100) covers your last 14 nights: day-to-day regularity, bedtime and wake time steadiness, weekend shift, and last night versus your usual, with a breakdown of what moved the score. ENERGY LEVELS An estimated energy curve for today based on your sleep, with your morning peak, afternoon dip, evening peak, a caffeine cutoff and a wind-down time. It is an estimate from sleep data, not a measurement. LAST NIGHT AND TRENDS • Last Night: total sleep, bedtime and wake time, plus a sleep-stage chart when your device records stages. • Night detail: see which sources were used, trim or exclude a night, add tags and notes. Adjustments stay in Restmark; Apple Health is never changed. • Trends: Last 7 Nights with readiness, Bedtime & Waketime histograms with weekday filters, a 30-day sleep debt chart, and every night grouped by month. SLEEP PLAN Choose tomorrow's wake-up time to see your Ideal Bedtime, sleep-cycle-aligned bedtime options with their effect on your debt, and times to avoid because they would wake you mid-cycle. The reverse planner suggests wake-up times for a bedtime you pick. ALSO • Home Screen and Lock Screen widgets • Optional local notifications: Morning Summary, Wind-Down Reminder before your Ideal Bedtime, Sunday Weekly Recap • Reorder or hide the cards on Today • Light, Dark or Match iPhone appearance PRIVATE BY DESIGN Restmark reads sleep, heart rate variability and resting heart rate from Apple Health, and never writes to it. Your data stays on your iPhone: no servers, no accounts, no analytics, no ads, no tracking, and nothing is sold or shared. WHAT YOU NEED An iPhone with iOS 17 or later and sleep data in Apple Health, for example from Apple Watch, or from a Fitbit whose sleep is synced into Apple Health. Sleep stages, HRV and resting heart rate depend on what your device records. Restmark needs a few nights of data before every score appears. Restmark is for general wellness and is not a medical device. It does not diagnose, treat or prevent any condition. Talk to a doctor about any sleep or health concern. ## Is Restmark safe? Not enough ratings yet to assess Restmark. ## Is Restmark legit? Restmark: Sleep Debt Tracker has limited verification signals. The AppsHunter Legitimacy Score for Restmark is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 2.0.2 — 2026-10-29 See how much last night added to or paid down your sleep debt, right on the Today screen and in each night's details. ### 2.0.1 — 2026-10-28 Improved heart rate variability handling for more reliable readiness and sleep insights, including support for the newer HRV data in iOS 27. ### 2.0 — 2026-10-28 No release notes. ## Related topics [traker sleep](https://appshunter.io/ios/topics/traker-sleep) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*