Apnea Diver is a training app to help you improve your breathing technique and ability to hold your breath, specifically for Apnea Diving.  This app works on strengthening the diaphragm muscles to help fill your lungs with more oxygen on inhalation and release as much carbon dioxide upon exhalation. The static tables also help to improve general athletic ability because it improves you lung capacity. 
 
There are 3 exercise tables. The first focussing on carbon dioxide exhalation, the second on increasing oxygen inhalation and the third focusses on Pranayama which is good for meditation and stress relief. 
Features:
  -Stop-watch to set maximum breath hold time
  -Auto and adjustable settings for exercise tables
  -Audio instructions
  -Log book to track progress
  -Ability to save custom settings