Apnea for free divers 1.7

the author of this app says:

How Deep You Can Breath ? Professional training APP for free divers Complete package of workouts to increase free dive time. The application contains exact instruction and help information how to use and improve your diving time using it's workout, also by entering your personal information it is automatically generate CO2, and O2 intervals, and start your workout according it. High level of CO2 creates desire to start breath therefore to extend the time of free dive, we should train the body to high level of CO2 and also low level of O2. CO2 Tolerance table- designed to accustom the body to high levels of carbon dioxide by shortening time to rest between scheduled stops breathing. The length of breath scheduled to be 50% maximum long breath and your table contain no more than 8 cycles. O2 Deprivation table- designed to accustom the body to extremely low levels of oxygen by the extension of time to breath between scheduled rest periods. The length of the table last breath be not more than 80% of the time your maximum breath and table contain no more than 8 cycles. Recommended to do between two and four tables in a week - one at a time - do not train two types of tables same day. Apnea app provide you a comfort way to automatically generate tables and guide you during the workout of the breath holding. This APPs will lead to great improvement to your free diving time. Speech or sounds is supported to alert and direct you during the workouts. Any questions, suggestions or problem report are welcome using the support page/Email.