[Application Introduction]
Apnea Plan is a professional free diving breathing training application that helps you improve your breath holding ability scientifically. Whether you are a beginner or an advanced diver, you can find a training plan that suits you.

[Core functions]
• CO2 tolerance training
- Three difficulty levels from elementary to advanced
- Scientific breathing interval settings
- Complete training timing and prompts
- Automatic recording of training data

• O2 adaptation training
- Professional decremental rest time design
- Adjustable training intensity
- Voice prompts to assist training
- Automatic recording of training data

• Maximum breath-holding challenge
- Record personal best results
- Diaphragm twitch count
- Detailed training data analysis
- Progress tracking and history

• Free training mode
- Customized training plan
- Flexible training parameter settings
- Personalized training goals
- Training plan management

[Featured functions]
• Professional audio prompt system
• Complete training history
• Dark mode support
• Multi-language interface (Chinese/English/Russian)
• Intuitive data visualization
• Offline use, no network required

[Safety tips]
Please train in a safe environment. It is recommended to practice with someone accompanying you. If you feel unwell, please stop training immediately.

【Technical Support】
If you have any questions or suggestions, please feel free to contact us. We will continue to optimize and update the app to provide you with a better training experience.