See how your heart responds to your breath in real time. Garmin’s built-in breathwork timer paces your breathing, but it doesn’t show you if your nervous system is actually shifting into recovery. This app turns your watch into a live Heart Rate Variability (HRV) biofeedback lab—guiding your breath while measuring real-time Heart Coherence from your beat-to-beat (R-R) intervals. Whether you want to lower daily stress, recharge your Body Battery, speed up post-run recovery, or improve sleep quality, 5 minutes of resonant breathing brings your heart, lungs, and vagus nerve into synchronization. WHY HEART COHERENCE? When you breathe at a slow, steady rhythm (around 5.5 to 6 breaths per minute / 0.1 Hz), your heart rate naturally accelerates on the inhale and slows down on the exhale. This physiological state—known as Heart Coherence or Respiratory Sinus Arrhythmia (RSA)—shifts your autonomic nervous system out of "fight-or-flight" stress and into deep parasympathetic recovery. KEY FEATURES • LIVE COHERENCE BIOFEEDBACK Watch your Coherence Score update in real time as your heart rhythm locks into phase with your breathing wave. • COLOR-CODED COHERENCE ZONES Instant visual feedback shows whether you are in Low (Red), Medium (Blue), or High (Green) coherence—so you know immediately when your body settles into resonance. • EYES-CLOSED HAPTIC PACING Don’t want to stare at your watch? Follow gentle, distinct wrist vibrations for inhale, hold, and exhale. Perfect for eyes-closed meditation, Savasana, or winding down in bed without screen glare. • CUSTOM RESONANCE PACING Train at the classic 0.1 Hz resonance frequency (5s Inhale / 5s Exhale), slow down to 5.5s, or customize your inhale, hold, and exhale ratios (including Box Breathing and 4-7-8). • OPTICAL HR & CHEST STRAP SUPPORT Works anywhere using your watch’s built-in Elevate optical heart rate sensor (with smart artifact filtering for clean readings while sitting still) or paired with an external chest strap (HRM-Pro, HRM-Dual, Polar H10) for clinical-grade beat-to-beat accuracy. • PHONE-FREE & PRIVACY FIRST 100% standalone on your wrist. Leave your phone in another room. No accounts, no subscriptions, and zero personal data leaves your Garmin ecosystem. WHO IS THIS FOR? • Runners, Cyclists & Triathletes: Accelerate autonomic recovery after hard workouts and improve overnight HRV Status. • High-Stress Professionals: Reset your nervous system in 3 to 5 minutes between meetings or before high-pressure events. • Better Sleepers: Down-regulate a racing mind before bed to improve deep sleep and morning readiness. • Meditators & Breathwork Practitioners: Quantify your stillness with objective vagal tone biofeedback. HOW TO GET THE BEST RESULTS 1. Sit comfortably or lie down and rest your watch arm still on your lap or chest. 2. Breathe smoothly and effortlessly through your nose into your belly—do not force deep breaths. 3. Match your inhale and exhale to the visual pacer or haptic vibrations, and watch your coherence score climb into the Green zone. Keywords: Heart Coherence, HRV Biofeedback, Resonant Frequency Breathing, Breathwork, Respiratory Sinus Arrhythmia, RSA, Vagus Nerve, Stress Relief, Box Breathing, Meditation, Recovery, HeartMath alternative. Note: This app is designed for wellness, fitness recovery, and educational biofeedback purposes only and is not a medical device.

Version 1.11 • Real-time Heart Coherence & HRV biofeedback powered by live beat-to-beat (R-R) heart rate intervals. • Added support for Devices: D2™ Air X15, D2™ Mach 1 Pro, Enduro™ 2, Forerunner® 165, Forerunner® 165 Music, Forerunner® 170, Forerunner® 170 Music, Forerunner® 255, Forerunner® 255 Music, Forerunner® 255S, Forerunner® 255S Music, Forerunner® 265, Forerunner® 265S, Forerunner® 570 - 42mm, Forerunner® 570 - 47mm, Forerunner® 945, Forerunner® 945 LTE, Forerunner® 955 Dual Power, Forerunner® 965, Forerunner® 970, Mercedes-Benz Venu® 2, Mercedes-Benz Venu® 2S, Venu® 2, Venu® 2 Plus, Venu® 2S, Venu® 3, Venu® 3S, Venu® 4 – 41 mm, Venu® 4 – 45 mm, epix™ (Gen 2), epix™ Pro (42mm), epix™ Pro (47mm), epix™ Pro (51mm), fenix® 9 - 43 mm, fenix® 9 Pro - 43 mm, fenix® 9 Pro - 47 mm, fenix® 9 Pro - 51 mm, fenix® 9 Pro - Solar 47 mm, fenix® 9 Pro - Solar 51 mm, fenix® 9 – 47 mm, fēnix® 7, fēnix® 7 Pro, fēnix® 7 Pro – Solar Edition (No Wi-Fi®), fēnix® 7S, fēnix® 7S Pro, fēnix® 7X, fēnix® 7X Pro, fēnix® 7X Pro No Wi-Fi, fēnix® 8 AMOLED (43mm), fēnix® 8 AMOLED (47mm/51mm), fēnix® 8 Pro, fēnix® 8 Solar (47mm), fēnix® 8 Solar (51mm), tactix® 7, tactix® 7 – AMOLED Edition, tactix® 8 – 47 mm, AMOLED, tactix® 8 – 51 mm, Solar, vívoactive® 5, vívoactive® 6 • Eyes-closed haptic vibration cues for inhale and exhale transitions. • Smart optical HR artifact filtering + full support for external ANT+/BLE chest straps. • Post-session summary with time spent in Low, Medium, and High coherence zones.