Train Your Breath. Unlock Your Potential. BreatheDeep – Apnea Trainer is your personal breath-hold training app, designed to improve your lung capacity, CO2 tolerance, and overall breathing control through guided apnea tables. Whether you're into freediving, surfing, spearfishing, or simply want to strengthen your breath, this app helps you breathe better and hold longer. Included Programs: Breath-Hold Test – Measure your maximum breath hold and track your progress. CO2 Tolerance Training – Reduce the urge to breathe and build mental endurance. O2 Training – Improve oxygen efficiency and push your limits safely. Features: Guided sessions with vibration and sound cues. Progressively increasing difficult as long as you progress with your max breath holding time. Training history with progress indicators. Detailed stats view per session. Beginner-friendly guidance and tips. Clean interface and smooth experience. Try 3 sessions for free, then unlock lifetime access with a one-time purchase. No subscriptions. No hidden fees. Just your training – simple and affordable. Whether you're a beginner or an experienced diver, BreatheDeep helps you train smarter and breathe deeper.