# HRV-Tracker — HRV and Stress monitoring > Heart rate variability tracker for health insights on iPhone and Apple Watch. (iPhone/iPad app by Philippe Gerin.) - Source: https://appshunter.io/ios/app/hrv-tracker/id6746576506 (this page in markdown: same URL + `.md`) - Developer: [Philippe Gerin](https://appshunter.io/developer/1817452297) - Category: Lifestyle - Price: Free with in-app purchases - Rating: 4.70/5 from 3 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 8 MB - Languages: American English - Released: 2026-01-11 - Data updated: 2026-08-24 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/hrv-tracker/id6746576506/reviews.md ## What is HRV? HRV Tracker — native iPhone & Apple Watch app that turns heart rate variability into actionable health insights. OVERVIEW HRV Tracker reads your HRV from Apple Health and presents it through clean, scientific visualizations: an all-day stress curve, an Energy (Body Resources) reserve, a nightly Sleep Score, and a personalized Recovery score. It tracks both SDNN (Apple's standard HRV metric) and RMSSD (from raw beat-to-beat intervals) for a complete view of autonomic nervous system activity. iOS APP • Five views: Home, SDNN, RMSSD, Stress, and Energy • Dual HRV metrics (SDNN + RMSSD) side by side • All-day Stress curve combining heart rate and HRV, with sleep and workouts overlaid • All-day Energy reserve that drains under stress and recharges with rest and sleep • Nightly Sleep Score blending duration, continuity and HRV-based restfulness • Personalized Recovery score from your 7-day baseline • Age-adjusted zones using research-backed thresholds • Daily, weekly, monthly and yearly trends with interactive charts APPLE WATCH APP • Native app with circular Recovery and Stress gauges • Inline SDNN and RMSSD values at a glance • Statistical Z-score analysis vs your personal 7-day baseline • Dedicated SDNN, RMSSD and Stress chart complications with live data • RMSSD computed in real time from raw RR intervals (heartbeat series) • Background processing with optimized battery usage • Supports Graphic Corner, Circular, Bezel, Rectangular and Extra Large DATA REQUIREMENTS Important: This app delivers meaningful insights only when AFib History is enabled on your Apple Watch (Watch app › Heart › AFib History). It greatly increases beat-to-beat data collection, providing the rich dataset needed for accurate stress curves, energy tracking, statistics and personal baselines. Without it, measurements are too infrequent for reliable trends, stress, energy or recovery. KEY FEATURES All-Day Stress • Continuous 0–100 score computed at every heart-rate sample for a dense intraday curve • Two signals weighted 50/50: your RMSSD ranked against your history, and your heart-rate reserve • Smoothed trend showing how stress builds and fades through the day • Sleep shaded, workouts excluded, so it reflects genuine autonomic stress • Watch-off periods clearly greyed out Energy — Body Resources • An all-day 0–100 reserve showing how much you have "in the tank" • Depletes with stress and effort, recharges during genuine calm and sleep • Sleep-stage aware: deep sleep restores most, REM least • Fully reproducible from Apple Health — no stored state, always consistent Sleep Score • A 0–100 score for last night, on the Home card and a history screen • Blends duration (40%), continuity (30%) and restfulness (30%, from your overnight HRV) • Colour-banded poor/fair/good/excellent, with per-night history and averages Dual HRV Metrics • SDNN: standard deviation of NN intervals from Apple Health • RMSSD: root mean square of successive differences, from raw heartbeat series • Side-by-side on iPhone and Apple Watch Smart Recovery Scoring • One unified Recovery score across iPhone and Apple Watch • Based on your RMSSD trend vs a personal 7-day rolling baseline • Filtered baselines that exclude statistical outliers • Adaptive algorithm that improves as it learns your patterns Visualization • Daily, weekly, monthly and yearly trends with interactive charts • Filtered baselines and personal historical ranges • Color-coded zones inspired by heart-rate training systems All HRV data stays on-device and integrates with Apple Health. Nothing is sent to external servers — complete privacy of your health information. For health-conscious individuals, athletes and wellness enthusiasts seeking evidence-based recovery and stress insights through HRV. Requires Apple Watch with AFib History enabled for optimal functionality. ## Key features - Dual HRV metrics (SDNN + RMSSD) - All-day stress curve - Energy (Body Resources) reserve tracking - Nightly Sleep Score - Personalized Recovery score - Interactive trend charts - Apple Watch complications ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Bronze Supporter | $1.99 | one-time | | Silver Supporter | $4.99 | one-time | | Gold Supporter | $11.99 | one-time | | Platinum Supporter | $44.99 | one-time | | Silver Supporter | $4.99 | one-time | | Bronze Supporter Tier | $1.99 | one-time | | Platinum Supporter | $44.99 | one-time | | Gold Supporter | $11.99 | one-time | ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/hrv-tracker/id6746576506/reviews.md ### 5/5 — Great app *2026-07-01* I would just like the watch to update with the stress monitor though out the day without having to open the app **Developer response:** It should work. Please contact me for assistance. ### 5/5 — Great app *2026-06-22* Disagree with the previous reviewer who complained about scientific explanations. Inquiring minds want to know! Thanks for this app. I’ll e supporting you. ### 4/5 — Almost there *2026-06-08* What Apple should have built! This app takes Apple’s raw HRV data and turns it into something meaningful and actionable. Metrics like Stress and Recovery make it much easier to understand what your body is telling you, bringing the experience closer to products like WHOOP while still using the Apple Watch and Apple Health ecosystem. My only suggestion would be to simplify some of the scientific explanations within the app. Most users don’t need detailed research references or technical terminology. A plain-English explanation focused on what the metrics mean and how to use them would make the app even more approachable. The deeper scientific content could live on the developer’s website for those who want to learn more. That said, this is an excellent app even in its current form. Beautifully designed, useful, and one of the best Apple Watch health apps I’ve tried. ## Frequently asked questions about HRV ### What data does HRV-Tracker need to function? HRV-Tracker requires AFib History to be enabled on your Apple Watch. This feature significantly enhances beat-to-beat data collection, which is crucial for the app's accurate stress curves, energy tracking, statistics, and personal baselines. ### How does HRV-Tracker calculate its scores? The app calculates an all-day stress score from heart rate and HRV, an Energy reserve based on stress and rest, and a Sleep Score blending duration, continuity, and HRV-based restfulness. Recovery scores are personalized based on a 7-day baseline. ### Can I use HRV-Tracker without an Apple Watch? While HRV-Tracker is designed for both iPhone and Apple Watch, its most meaningful insights are derived from the rich beat-to-beat data collected by the Apple Watch, especially when AFib History is enabled. The iPhone app presents data synced from Apple Health. ### What are the dual HRV metrics used by HRV-Tracker? HRV-Tracker uses both SDNN, the standard deviation of NN intervals from Apple Health, and RMSSD, the root mean square of successive differences calculated from raw beat-to-beat intervals. This provides a comprehensive view of autonomic nervous system activity. ### How frequently is HRV-Tracker updated? The latest version of HRV-Tracker is 1.5, and it was last updated on July 6, 2026. Updates typically focus on improving features, data accuracy, and user experience based on scientific research and user feedback. ### What devices does HRV-Tracker support? HRV-Tracker is compatible with iPhone, iPad, and Apple Watch devices. It leverages the capabilities of these devices to provide detailed health insights. ### Does HRV-Tracker have ads? No, HRV-Tracker does not contain advertisements. The app is focused on providing a clean and uninterrupted user experience for health monitoring. ### What is the age rating for HRV-Tracker? HRV-Tracker has an age rating of 4+. This indicates that the content is generally suitable for all ages, with minimal or no mature themes. ## Version history (last 5 releases) ### 1.5 — 2026-07-06 NEW — Energy (Body Resources) A new all-day energy reserve (0–100) showing how much you have "in the tank." It drains with stress and physical effort and recharges during genuine calm and sleep — with deep sleep restoring the most. Available as a dedicated view and a tile on Home. NEW — Sleep Score A nightly 0–100 score for last night, blending sleep duration, continuity and HRV-based restfulness. See the full breakdown on the Home card and follow your trend on the new history screen. IMPROVEMENTS • Refined Stress, Recovery and HRV metrics for more consistent results across iPhone and Apple Watch • Clearer charts and trend visualizations BUG FIXES • Fixed cases where a watch complication could keep showing an outdated measurement after a background refresh • More reliable background updates — a new reading is no longer lost if a secondary calculation is interrupted • Recovery score now stays accurate when updated in the background • Various stability and performance improvements Thank you for using HRV Tracker! ### 1.4 — 2026-05-29 All-day Stress monitoring is here! • NEW: Continuous Stress score — a dense, all-day curve built from your heart rate and HRV, with sleep and workout context. See exactly when stress rises and recovers through your day. • NEW: Redesigned interface with four dedicated views (Home, SDNN, RMSSD, Stress) and a cleaner Apple Watch layout with circular Recovery and Stress gauges. • NEW: Unified Recovery score, now consistent across iPhone and Apple Watch. • Each daily chart now shows your latest reading and its time, alongside the daily average. • Periods when your watch isn't worn are clearly indicated, so you never mistake missing data for low stress. • Numerous bug fixes and stability improvements, including chart loading and day-to-day data continuity. ### 1.3 — 2026-04-09 - Interface improvements - bugs fixes ### 1.2 — 2026-03-01 RMSSD Tracking New RMSSD chart on iOS with interactive navigation and baseline envelope RMSSD calculated from raw beat-to-beat intervals for precise parasympathetic activity monitoring Dedicated RMSSD recovery score with personalized baseline Weekly view New Watch Complications RMSSD rectangular complication with live chart RMSSD circular complication with recovery gauge RMSSD inline and corner complications Both SDNN and RMSSD complications update simultaneously Chart Improvements Period indicator displayed on charts (Today, date, month, or year) Improved baseline envelope visibility in dark mode Bug Fixes ### 1.1 — 2026-01-13 -Bugs Fixed ## Related topics [hrv tracker pro](https://appshunter.io/ios/topics/hrv-tracker-pro) · [hrv tracker](https://appshunter.io/ios/topics/hrv-tracker) --- *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 2026-08-24.*