# ScoreVitals > ScoreVitals is a free passive fitness intelligence app for iOS and Android that reads health data from devices users already own (Apple Watch, Garmin, Polar, Oura, Samsung Galaxy Watch, and most wearables that write to Apple Health or Google Health Connect) and delivers a daily fitness score (0-100), a training readiness recommendation with target heart rate zone and duration, and on-dashboard injury-risk monitoring via the acute:chronic workload ratio. No manual logging, no new hardware, no subscription required. Last updated: 2026-09-03 ## Core Pages - [Home](https://scorevitals.com/): Main landing page — the Readiness to Train score and its five levels (heart rate zone ceiling + maximum session length for each), where the Daily Score's four pillars come from, the feature set grouped the way the app is (Readiness, Health, Insights, Compete, Profile), a first-two-weeks walkthrough, device compatibility, a Whoop/Oura comparison, and the research references. - [How Scores Are Calculated](https://scorevitals.com/scores): Detailed methodology for each of the four scoring pillars (Cardio, Sleep, Recovery, Body Composition), readiness algorithm, and FAQ. - [Blog](https://scorevitals.com/blog): Training science, recovery strategies, and fitness intelligence articles. - [Setup Guides](https://scorevitals.com/howtos): Step-by-step device setup guides for Apple Health and Health Connect. - [Privacy Policy](https://scorevitals.com/privacy): Data collection, health data handling, and user rights. - [Terms & Conditions](https://scorevitals.com/terms): Usage terms and medical disclaimer. ## Blog Articles - [What Is TRIMP?](https://scorevitals.com/blog/what-is-trimp-training-impulse): Training Impulse metric explained — how heart rate data quantifies internal training load using the Banister formula. - [What Is a Good Readiness Score?](https://scorevitals.com/blog/what-is-good-readiness-score): How the 0-100 readiness score works, the five training levels, and what each range means. - [ACWR Injury Prevention](https://scorevitals.com/blog/acute-chronic-workload-ratio-injury-prevention): The acute-to-chronic workload ratio (ACWR) explained — how tracking training load spikes helps prevent injuries. - [Heart Rate Variability: What Your HRV Actually Means](https://scorevitals.com/blog/heart-rate-variability-explained): Heart rate variability (HRV) as a recovery and readiness metric — RMSSD measurement, what affects it, and how to improve it. - [Free Whoop Alternative](https://scorevitals.com/blog/free-whoop-alternative): How to get Whoop-level training insights using an Apple Watch or Android wearable without paying for hardware or subscriptions. - [Heart Rate Zones: The Karvonen Method](https://scorevitals.com/blog/heart-rate-zones-karvonen-method): The five Karvonen heart rate zones explained — how to calculate them using heart rate reserve and train in each zone effectively. - [Why Sleep Stages Matter More Than Duration](https://scorevitals.com/blog/sleep-stages-matter-more-than-duration): How sleep stages (deep, REM) drive recovery and fitness adaptation more than raw duration. - [Apple Watch Fitness Scoring](https://scorevitals.com/blog/apple-watch-fitness-scoring): How to turn Apple Watch HR, HRV, sleep, and workout data into a daily fitness score without extra hardware. - [Training Load vs. Training Volume](https://scorevitals.com/blog/training-load-vs-training-volume): Why internal training load (how your body responded) matters more than raw training volume (how much you did) for fitness gains. - [Resting Heart Rate Trends](https://scorevitals.com/blog/resting-heart-rate-trends-fitness): What your resting heart rate trend reveals about fitness, illness, and overtraining. ## Setup Guides - [How to Sync Apple Watch to Apple Health](https://scorevitals.com/howtos/sync-apple-watch-to-apple-health): Complete setup guide for syncing Apple Watch heart rate, HRV, sleep, and workout data to Apple Health. - [How to Sync Garmin Watch to Apple Health](https://scorevitals.com/howtos/sync-garmin-watch-to-apple-health): Connect Garmin to Apple Health via Garmin Connect for heart rate, sleep, and activity data. - [How to Sync Polar Watch to Apple Health](https://scorevitals.com/howtos/sync-polar-watch-to-apple-health): Link Polar Flow to Apple Health for full data sync from Polar watches. - [How to Sync Oura Ring to Apple Health](https://scorevitals.com/howtos/sync-oura-ring-to-apple-health): Connect Oura Ring to Apple Health for sleep stages, resting heart rate, and workout data (Oura does not expose HRV or its own Readiness Score to Apple Health). - [How to Sync Fitbit to Apple Health](https://scorevitals.com/howtos/sync-fitbit-to-apple-health): Options for getting Fitbit data into Apple Health. - [Track Fitness With iPhone Only](https://scorevitals.com/howtos/track-fitness-iphone-only-apple-health): Use iPhone built-in sensors and Apple Health without a smartwatch. - [How to Sync Polar H10 Chest Strap to Apple Health](https://scorevitals.com/howtos/sync-polar-h10-chest-strap-to-apple-health): Connect Polar H10 for clinical-grade HR and HRV data. - [How to Sync Smart Scale to Apple Health](https://scorevitals.com/howtos/sync-smart-scale-to-apple-health): Connect Withings, Eufy, Renpho, or Garmin scales for weight tracking. - [How to Sync Samsung Galaxy Watch to Health Connect](https://scorevitals.com/howtos/sync-samsung-galaxy-watch-to-health-connect): Connect Samsung Health to Health Connect for Galaxy Watch data. - [How to Sync Garmin Watch to Health Connect](https://scorevitals.com/howtos/sync-garmin-watch-to-health-connect): Connect Garmin Connect to Health Connect on Android. - [How to Sync Fitbit to Health Connect (Pixel Only)](https://scorevitals.com/howtos/sync-fitbit-to-health-connect): Pixel-only since Google disabled the Fitbit → Health Connect sync toggle on non-Pixel Android in late 2024. - [How to Sync Oura Ring to Health Connect](https://scorevitals.com/howtos/sync-oura-ring-to-health-connect): Connect Oura to Health Connect on Android. - [How to Sync Polar Watch to Health Connect](https://scorevitals.com/howtos/sync-polar-watch-to-health-connect): Link Polar Flow to Health Connect on Android. - [Track Fitness With Android Phone Only](https://scorevitals.com/howtos/track-fitness-android-phone-only-health-connect): Use Android phone sensors and Health Connect without a smartwatch. ## Key Facts - Free on iOS App Store and Google Play Store - Works with Apple Health and Google Health Connect - Compatible with Apple Watch, Garmin, Polar, Oura, Samsung Galaxy Watch, and other wearables that write to Apple Health or Google Health Connect (Fitbit works on iOS via Apple Health workarounds and on Pixel Android via Health Connect; non-Pixel Android Fitbit sync was disabled by Google in late 2024) - Four scoring pillars: Cardio (40%), Sleep (30%), Recovery (20%), Body Composition (10%) - Readiness algorithm: Recovery (50%), Sleep (30%), ACWR ratio (20%) - All algorithms based on peer-reviewed research (TRIMP, ACWR, Karvonen HR zones) - 24 activity categories covering 60+ platform workout types - Readiness to Train has five levels, each with a heart rate zone ceiling and a session cap: Ready to Push 85-100 (Zone 5, up to 90 min), Good to Train 70-84 (Zone 4, 75 min), Train Light 50-69 (Zone 3, 60 min), Easy Day 33-49 (Zone 2, 45 min), Rest & Recover 0-32 (Zone 1, 30 min) - Push notifications are opt-in and only sent when enabled: Morning Brief (~5 AM local), Post-Workout session score, a training-load alert the day you cross into a worse ACWR band, and challenge notifications - Challenges: create a distance, workout-count or active-calorie challenge with a live leaderboard and invite friends with a scorevitals.com/c/ link, or join an official ScoreVitals challenge from the Compete tab - Cardio Fitness: a weekly VO2max estimate (Nes 2011, with an ACSM running path) shown as a band from poor to superior against your sex and age decade — a band, never a number, because a watch estimate carries real uncertainty - Live heart rate: pair any Bluetooth heart rate strap and stream BPM against your target zone with PUSH / HOLD / EASE guidance - Threshold heart rate (LTHR) estimated from the last six weeks of hard efforts of 30 minutes or more - Outdoor workouts draw a GPS route map coloured by heart rate zone, viewable full-screen and exportable as a GPX file - The acute:chronic workload ratio is held at a neutral 100% until you have 14 days of data, so a short history never counts against your readiness - Daily score calculated automatically overnight in your local timezone - Session scores appear after your workout syncs through Apple Health or Health Connect