BreatheBox: Custom Rhythm

BreatheBox brings guided breathwork to your pocket. Three proven clinical patterns — Box breathing, 4-7-8 relaxing breath, and Coherent 5.5 — plus a custom rhythm editor so you can build and save your own breathing pattern. A smooth animated circle leads every inhale, hold, exhale, and rest. No timer setup, no subscription, no account. WHY BREATHE? Slow, paced breathing activates the parasympathetic nervous system, lowers heart rate, and reduces cortisol in minutes. Athletes use it before competition, surgeons before surgery, Navy SEALs under pressure. BreatheBox puts the same toolkit on your iPhone — free of bloat, paywalls, and dashboards. THREE CLINICAL PRESETS • Box breathing (4-4-4-4) — used by the Navy SEALs and NASA to steady focus under stress. Equal four-second phases build concentration and calm in noisy environments. • 4-7-8 (4-7-8-0) — Dr. Andrew Weil's natural tranquilizer.…