Breath Hold Trainer

Train your breath-hold. Breath Hold Trainer guides your dry breathing and breath-hold sessions with a single button: tap to switch between hold and recovery, get a 3-2-1 countdown before each hold, and follow your progress with a gentle vibration that fires only during the hold — never during recovery. Practice seated or lying down, at home or on the go. Perfect for breathing exercises, CO₂ and O₂ tolerance tables, focus and relaxation work, and building calm control over your breath. Key features: -One-button cycles: hold ↔ recovery, with a marker for each interval -3-2-1 countdown before every hold -Adjustable alarm (off, or 15–300 s, to the second) -Live heart rate (wrist or chest strap) -Color state ring and post-session summary -Pause and resume mid-session -Garmin Connect sync: per-interval laps and heart rate, so you can see how your body responds during each hold Free and ad-free. DISCLAIMER: This app is intended for "dry" use only (seated or lying down). Never use it in or near water.