Apnea Trainer: Freedive

Apnea Trainer helps you improve breathing technique and extend underwater time during your next diving or snorkeling trip. Based on a yoga-inspired breathing method, it strengthens the diaphragm to increase oxygen storage and CO2 tolerance, helping you stay submerged longer on a single breath.

Key features include training to improve free diving time, a pranayama mode to calm your body before diving, custom time settings for pro divers, optical and audio instructions, and an easy-to-use interface. The app also includes an updated user interface developed with input from Minimalist.ch.