# Night and Day Tracker — Track Sleep Debt & Activity > Advanced sleep and fitness tracker with personalized health insights and no subscription. (iPhone/iPad app by Gareth Hobbs.) - Source: https://appshunter.io/ios/app/night-and-day-tracker/id6754933205 (this page in markdown: same URL + `.md`) - Developer: [Gareth Hobbs](https://appshunter.io/developer/1850981913) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 18.0 · 14 MB - Languages: American English - Released: 2026-01-08 - Data updated: 2026-08-30 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/night-and-day-tracker/id6754933205/reviews.md ## What is Night and Day Tracker? Sleep better. Perform better. Feel better. Night and Day is the sleep and fitness tracker built for people who want serious health insights, without all the fuss. Combining advanced sleep science with beautiful design, get the insights you need to optimize rest and performance. Best of all? No subscription required. Download once, use forever. SLEEP SCORE & INSIGHTS Wake up to a personalized sleep score that analyzes duration, quality, consistency, and recovery. Get actionable insights based on your unique patterns—not generic advice. SLEEP DEBT TRACKING Your body remembers lost sleep, even if you don't. Night and Day calculates your running sleep debt balance using your past two weeks of sleep, showing exactly how much rest you owe yourself. DESIGNED FOR APPLE WATCH Seamlessly integrates with Apple Watch as well as Oura Ring and any HealthKit-compatible tracker. All your data in one place. CUSTOM SLEEP TAGS Tag a night of sleep and see how certain events affect your sleep metrics over time DAILY READINESS SCORE Should you push hard today or take it easy? Your readiness score analyzes sleep quality, heart rate variability (HRV), resting heart rate, sleep debt, and recent activity to tell you how ready your body is to perform. WEEKLY ACTIVITY POINTS Earn points for every minute your heart rate elevates during exercise and daily activities. Light activity earns 1 point per minute, vigorous activity earns 2x. Hit the WHO-recommended 150 points each week to maintain optimal health. WORKOUT TRACKING & MAPPING Visualize your runs and rides with GPS route maps color-coded by heart rate zones. See exactly when you hit peak effort and track your performance over time. ADVANCED RECOVERY METRICS - HRV baseline comparison tracks your recovery vs. your personal average - Resting Heart Rate trends reveal stress and fatigue - Sleep stage analysis (Deep, REM, Core) - Sleep consistency scoring helps build healthy routines PRIVACY FIRST Your health data never leaves your device. Everything is processed locally on your iPhone using Apple's secure HealthKit framework. SCIENCE-BASED APPROACH Built using peer-reviewed sleep and exercise science. Our algorithms are based on research from sleep medicine, sports science, and circadian biology—not guesswork. BEAUTIFUL DESIGN Gorgeous visualizations make your data easy to understand. Track trends, spot patterns, and celebrate progress with an interface designed for clarity and motivation. PERFECT FOR: - Athletes optimizing training and recovery - Busy professionals balancing stress and rest - Anyone wanting to improve sleep quality - Fitness enthusiasts tracking performance - People managing sleep disorders - Health-conscious individuals FEATURES AT A GLANCE: * Daily sleep score with detailed breakdown * Sleep debt calculator with 2-week history * Readiness score combining sleep, HRV, and activity * Weekly activity point tracking (WHO 150-minute goal) * Heart rate variability (HRV) monitoring * Resting heart rate trends * Sleep stage analysis * Consistency and regularity scoring * Personalized daily insights * Works with all major fitness trackers * Dark mode optimized * No ads, no subscriptions. Free to download. GETTING STARTED: 1. Connect your fitness tracker via Apple Health 2. Sleep with your device overnight 3. Wake up to personalized insights 4. Track your progress over time Download Night and Day today and start making smarter decisions about your sleep and activity. Your body will thank you. --- ABOUT PERMISSIONS: Night and Day requires access to Apple Health to read sleep data, heart rate, workouts, and activity. We never share your data with third parties. Everything stays private on your device. ## Key features - Personalized sleep score and insights - Sleep debt tracking - Daily readiness score - Weekly activity points tracking - Workout tracking with GPS maps - Advanced recovery metrics (HRV, RHR) - Privacy-focused local data processing ## Frequently asked questions about Night and Day Tracker ### What is the sleep debt tracking feature in Night and Day? Night and Day calculates your running sleep debt balance by analyzing your sleep over the past two weeks. This feature helps you understand how much rest you owe your body, even if you don't consciously feel it. ### How does Night and Day determine my daily readiness score? Your readiness score is a comprehensive assessment that combines your sleep quality, heart rate variability (HRV), resting heart rate, accumulated sleep debt, and recent activity levels to indicate your body's preparedness for performance. ### Does Night and Day require a subscription? No, Night and Day does not require a subscription. The app is available as a one-time download and can be used forever without ongoing fees. ### What devices does Night and Day integrate with? Night and Day seamlessly integrates with Apple Watch, Oura Ring, and any other HealthKit-compatible tracker, consolidating all your health data in one convenient location. ### How does Night and Day ensure user privacy? Night and Day prioritizes privacy by processing all your health data locally on your iPhone using Apple's secure HealthKit framework. Your sensitive health information never leaves your device. ### What is the scientific basis for Night and Day's algorithms? The app's algorithms are built upon peer-reviewed sleep and exercise science, drawing from research in sleep medicine, sports science, and circadian biology to provide accurate and reliable insights. ### How does Night and Day track activity points? You earn points for every minute your heart rate elevates during exercise and daily activities. Light activity earns 1 point per minute, while vigorous activity earns 2x points, helping you aim for the WHO-recommended 150 points weekly. ### What age rating does Night and Day have? Night and Day has an age rating of 4+, making it suitable for a wide range of users interested in health and fitness tracking. ## Version history (last 4 releases) ### 2.2 — 2026-08-27 Bug fixes and performance improvements ### 2.1 — 2026-06-13 *NEW* — Insights tab allows you to see how certain activities or behaviors affect your sleep. Choose from convenient options like "alcohol" or "late meal", or create your own! — Hitting your activity point goal will now activate a "streak". See how many weeks you can keep your streak alive, or try to beat your previous record! — The sleep tab has been revamped to show richer info at a glance. — Sleep and readiness scores and now show historical scores and trends. ### 1.1 — 2026-02-08 Bug fixes and performance improvements. ### 1.0 — 2026-01-09 No release notes. ## Apps similar to Night and Day Tracker | App | Rating | Price | Category | | --- | --- | --- | --- | | [Khalisthenics](https://appshunter.io/ios/app/khalisthenics/id6754946080) | 5.0 (1) | Free | Health & Fitness | | [Tigris: AI Calorie Counter](https://appshunter.io/ios/app/tigris-ai-calorie-counter/id6759204681) | — | Free | Health & Fitness | | [StressLess: Stress Monitor](https://appshunter.io/ios/app/stressless-stress-monitor/id6751478115) | 5.0 (1) | Free | Health & Fitness | | [Phase - Sleep Schedule Reset](https://appshunter.io/ios/app/phase-sleep-schedule-reset/id6759457939) | 5.0 (3) | Free | Health & Fitness | | [SleepGlow - Sleep & Relax](https://appshunter.io/ios/app/sleepglow-sleep-and-relax/id6758992994) | 4.0 (1) | Free | Health & Fitness | | [CarbSync: Macro Tracker](https://appshunter.io/ios/app/carbsync-macro-tracker/id6758784101) | — | Free | Health & Fitness | ## Related topics [day and night run](https://appshunter.io/ios/topics/day-and-night-run) --- *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 2026-08-30.*