If you're eager to challenge yourself and pursue a deeper experience in underwater adventures, then this is the app for you!

We provide you with functions such as CO2 tolerance training, O2 training, and maximum apnea time testing to help you improve your free diving, apnea apnea, and diving skills.
By recording your practice history and displaying it in intuitive and clear charts, you can clearly understand your training progress and motivate yourself to continuously push your limits.

Don't hesitate, download this app now and make your underwater adventures more exciting and fulfilling! Improve your freediving skills and start a new underwater adventure!


[Automatic renewal service statement]
Payment: After the user confirms the purchase and makes the payment, it will be credited to the iTunes account;
Renewal: Apple's iTunes account will be deducted within 24 hours before the subscription expires. After the deduction is successful, membership rights will be extended for one month.
Cancel renewal: If you need to cancel renewal, please manually turn off the automatic renewal function in iTunes/Apple ID settings management 24 hours before the current permission expires. If you cancel within 24 hours before expiration, the subscription fee will be charged.

1. Purchase automatic renewal products. After confirming the purchase, the corresponding fees will be deducted from your Apple iTunes account;
2. After activating the automatic renewal service, you will be automatically renewed one day before the membership expires. If the renewal is successful, the member will automatically extend the corresponding period;
3. If you need to cancel the renewal, please manually turn off the automatic renewal function in iTunes/Apple ID settings management 24 hours before the current permission expires. If you cancel within 24 hours before the expiration, the subscription fee will be charged.

User Agreement: https://www.privacypolicies.com/live/b3b99492-e174-4cdf-9e97-f1029e886cf6
Privacy Policy: https://www.privacypolicies.com/live/97e14c06-c9bf-401e-ac9f-554a8dc535cb