The Freediving Apnea Trainer app enhances breath-holding capacity and stamina, benefiting freedivers of all levels, underwater hunters, and yoga practitioners. Users input their current maximum breath-hold time, and the app generates personalized training schedules. This app offers customizable training tables, allowing users to modify or create their own plans. Comprehensive progress tracking, via detailed training history and statistics, facilitates monitoring improvement. Furthermore, compatibility with pulse oximeters (like the Jumper500f) and Bluetooth heart rate monitors provides richer data. Finally, features such as a square breath timer, in-training notifications (voice and vibration), contraction marking, and pause/transition controls contribute to a complete and adaptable training experience. Importantly, this app is for fitness and wellness purposes only and should not replace medical advice; consult a physician for any health concerns.