# Sleep Debt: Brain Score — Sleep tracker & focus forecast > Sleep tracker & focus forecast (iPhone/iPad app by Ali Gur.) - Source: https://appshunter.io/ios/app/sleep-debt-brain-score/id6760761890 (this page in markdown: same URL + `.md`) - Developer: [Ali Gur](https://appshunter.io/developer/1843490354) - Category: Health & Fitness - Price: Free with in-app purchases - Age rating: 12+ - Requires: iOS 15.0 · 80 MB - Languages: American English, Turkish - Released: 2026-03-31 - Data updated: 2026-10-31 ## What is Sleep Debt? How sharp is your brain today? Sleep Debt looks at your last 14 nights and tells you — as a single number. Most sleep apps show you last night. But one good night doesn't erase a week of short sleep. Sleep Debt adds up the hours you've missed over the last 14 nights against your own sleep goal, weighting recent nights more heavily, and turns that into a forecast of today's mental capacity. "Your brain is at 78% today. Do the hard task tomorrow morning." EXAM MODE Studying for the SAT, finals or another big exam? Add the date: we'll show a countdown and the bedtime that gets you to exam morning debt-free — and remind you why sleeping beats cramming in the last nights. FREE — NO ACCOUNT NEEDED • Sleep debt score: how many hours you're behind, from your last 14 nights • Today's performance forecast: your estimated mental capacity, in % • Tonight's bedtime: a personal suggestion based on your wake time and debt • Recovery estimate: how many nights it takes to pay the debt back • Exam mode: countdown and a plan to arrive debt-free • Home Screen and Lock Screen widgets: your capacity and bedtime at a glance • Apple Watch app and watch face complications • Siri: "Sleep Debt capacity" and "Sleep Debt bedtime" • Share your score as an image • Morning check-in and weekly sleep recap • Works with Apple Health and Apple Watch — or enter sleep manually • Evening and morning reminders PREMIUM • Your daily focus hours: when to schedule your hardest work • Personal AI analysis of every night: what happened and what to do tonight • 90-day trends for sleep duration, debt and sleep stages • AI trend report for any period BUILT ON SLEEP RESEARCH The model is based on sleep-restriction research (Belenky et al., 2003) and sleep homeostasis: missed sleep accumulates, and cognitive performance falls with it — even when you don't feel tired. PRIVATE BY DESIGN No account, no sign-up. Your sleep data is stored on your device. AI analysis is optional: only when you allow it, the sleep durations and stages of the analyzed nights are sent to Anthropic's Claude model, without your name or email. Sleep Debt is not a medical device and does not diagnose or treat any condition. SUBSCRIPTION Premium is available as an auto-renewing subscription. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cooperative-parrotfish-b07.notion.site/Uyku-Borcu-Gizlilik-Politikas-Privacy-Policy-406e84385ddd80cfa69df02e9dadb26d ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Sleep Debt Premium (Monthly) | $4.99 | per month | | Sleep Debt Premium (Annual) | $29.99 | per year | ## Is Sleep Debt safe? Not enough ratings yet to assess Sleep Debt. ## Is Sleep Debt legit? Sleep Debt: Brain Score appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sleep Debt is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 3 releases) ### 1.2.0 — 2026-10-30 A big update! LEADERBOARDS (optional) Sign in with Apple or Google and join sleep, steps and sport leaderboards in your country and worldwide under a nickname. Win the weekly sleep-debt race. Only data measured automatically by your watch or phone counts. WORKOUTS Runs, walks and rides from your watch on Apple Maps, with the route colored by speed. Pace, heart rate, elevation and your mental capacity that morning, all in one place. SHARE TO YOUR STORY Send your sleep score or workout to your Instagram story in one tap, or add it as a sticker over your photo. UNWIND • Star Breath: connect constellations with your breath before bed. • Calm Pond: touch the water and watch the koi. MAKE THE HOME SCREEN YOURS Press and hold cards to rearrange them. Also: last night's sleep now syncs from Health as soon as you open the app, a redesigned Activity screen and small fixes. ### 1.1.0 — 2026-10-27 A big update! • New home screen: today's brain capacity and tonight's bedtime at a glance • Exam mode: add your exam date and get a plan to arrive debt-free • Your score now looks at the last 14 nights, with recent nights weighted more • Lock Screen widgets and a redesigned Home Screen widget • Apple Watch app and watch face complications • Siri: "Sleep Debt capacity" • Share your score, morning check-in and weekly recap • Premium: your daily focus hours; AI analysis fixed • Annual plan, 7-day free trial and new prices • English language support and many fixes ### 1.0 — 2026-03-31 No release notes. ## Apps similar to Sleep Debt | App | Rating | Price | Category | | --- | --- | --- | --- | | [Fade Out White Noise - Benect](https://appshunter.io/ios/app/fade-out-white-noise-benect/id6444240484) | 4.7 (12) | Free | Health & Fitness | | [Be Green](https://appshunter.io/ios/app/be-green/id1493035703) | 5.0 (25) | Free | Health & Fitness | | [SuperAge: Biological Age](https://appshunter.io/ios/app/superage-biological-age/id6751951815) | 4.7 (91) | Free | Health & Fitness | | [İlaç Takip Sistemi (İTS) Mobil](https://appshunter.io/ios/app/ilac-takip-sistemi-its-mobil/id1530795592) | 3.3 (7) | Free | Health & Fitness | | [Charm: Skincare Routine 360°](https://appshunter.io/ios/app/charm-skincare-routine-360/id1480983279) | 4.5 (1,518) | Free | Health & Fitness | | [forYou: Face Yoga & Massage](https://appshunter.io/ios/app/foryou-face-yoga-and-massage/id1540098894) | 4.6 (135) | Free | Health & Fitness | ## More apps by Ali Gur - [Bütçe Asistanı](https://appshunter.io/ios/app/butce-asistan/id6753323763) - [PDFixx](https://appshunter.io/ios/app/pdfixx/id6759792522) - [QRio - QR Code Scanner](https://appshunter.io/ios/app/qrio-qr-code-scanner/id6761298266) - [Taskify - Smart Todo & AI](https://appshunter.io/ios/app/taskify-smart-todo-and-ai/id6761413503) - [QuickGlance: Flashcards](https://appshunter.io/ios/app/quickglance-flashcards/id6762561099) All apps by Ali Gur: https://appshunter.io/developer/1843490354 --- *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.*