Breathing Timer: HRV · BOLT · Wim Hof · 4-7-8

A breathwork and biofeedback app for Garmin. Practice by feel — haptic and tone cues keep your eyes closed and on your breath. Train CO2 tolerance, nervous system recovery, or hypoxia with lab-grade biometrics on your wrist. Most apps make you watch a screen, breaking your focus — this one cues you through your skin with distinct vibration patterns instead. ◆ Eyes-Closed Guidance: Custom haptic patterns map out inhale, hold, exhale, and empty phases. ◆ Smart Home Screen: Recommends sessions from your Body Battery, stress, and recovery state. ◆ Premium Integration: Saves to Garmin Connect as a FIT activity with graphs, laps, and per-drill metrics — switch off to skip your activity log and Strava. 7 BUILT-IN BREATHING PROGRAMS Cycle through protocols via watch buttons or build up to 8 custom routines via the wizard (phases 0 to 2 min; set holds to 0 to skip). ◆ Resonant 5.5: Coherent breathing to maximize Heart Rate Variability (HRV). ◆ 5-5 Zen: Classic cardiac coherence to balance the nervous system. ◆ 4-6 Calm: Elongated exhales to trigger rapid parasympathetic activation. ◆ 6-2-6 Balance: Eases anxiety, grounds the mind, and sharpens cognitive focus. ◆ Triangular 4-4-4: Equal parts inhale, hold-in, and exhale. ◆ Box 4-4-4-4: Navy SEAL protocol for high-stress control and mental focus. ◆ 4-7-8 Sleep: Dr. Weil's natural nervous system tranquilizer for sleep prep. 8 SPECIALIZED EXERCISES AND TESTS ◆ Guided Breathing: Open paced practice with haptics, in-circle countdown, and live HR. ◆ BOLT Test: Measures Body Oxygen Level Test score to track CO2 tolerance. Saves with HR/SpO2. ◆ Max Exhale: Multi-round slow-exhale drill with hands-free auto-advance tracking your personal best. ◆ Buteyko Mini Pauses: Practice 5 to 30 rounds from Exercise 6 of the Buteyko Clinic. ◆ Wim Hof Method: Paced deep breaths, last-3-breath countdown, tap-to-end retention, recovery timing. Logs longest hold. ◆ Walking Hypoxic: Altitude training while walking. Hold breath, tap when air-hungry, recover (8 rounds). Saves as a Walking activity. ◆ Walking Hypoxic Advanced: Prime hold + 10-180s low-SpO2 phase. Live screen colors (Red under 80%, Green 80-91%, Amber over 91%) and scores in-zone seconds. ◆ Free Session: Unguided practice with a live biofeedback view of HR, HRV, SpO2, and stress. ADVANCED BIOMETRICS ◆ True HRV (RMSSD): From raw beat-to-beat R-R intervals via an ANT+ or BLE strap. No estimates. ◆ RSA Fallback: Peak-to-peak HR per breath for watch-only tracking. Built-in "About HRV" helper. ◆ Zero-Noise Calibration: A 10-second pre-roll captures your baseline before every session. ◆ Delta Comparisons: Color-coded start-vs-end metrics for HR, HRV, respiration, SpO2, and stress. ◆ SpO2 Safety Alerts: Vibration if blood oxygen drops below your threshold (70-95%) during hypoxia drills. PROGRESS TRACKING ◆ Local History: Stores last 30 sessions, with its own history for every drill type. ◆ Rewards: New Personal Best ribbons and training-state badges (Building, Stable, Peak, Recovery). ◆ On-Wrist Trend Charts: Trend graphs for BOLT, Max Exhale, Buteyko, Wim Hof, Hypoxic, HRV, and stress. ◆ Native Controls: Garmin Save/Resume/Discard menus via the BACK button. CUSTOMIZATION ◆ Fully Adjustable: Fine-tune haptics/tones, phase durations (up to 2 min), and auto-stops (3-60 min, or unlimited). Edit on-watch or via Connect Mobile. ◆ Start on Drills: Launch straight into your breath-hold drills. BACK still reaches home. ◆ Program Nickname: Rename a custom routine from Connect Mobile — sticks everywhere, including your activity title. Not on memory-limited watches. ◆ Device Support: Optimized for 100+ Garmin watches — Fenix, Epix, Forerunner, Venu, Vivoactive, Enduro, Instinct, MARQ, Descent, and Approach. NOTE FOR MEMORY-LIMITED DEVICES: Instinct 2/2S/2X, Crossover, and Descent G1 run the 7 breathing programs only — drills and trend charts need a higher-memory watch.

WHAT'S NEW IN 1.11.0 Added - fenix 9 family support. Added 7 SDK-proven watches: fenix 9 43/47 mm, fenix 9 Pro 43/47/51 mm, and fenix 9 Pro Solar 47/51 mm (including the inReach variants represented by those Garmin product profiles). All 107 supported product IDs build successfully with Connect IQ SDK 9.2.0 and the 3.2.0 minimum SDK target.