A companion to scuba divers. This app can help you time your dives, and record your air consumption and compass heading. Simply press the up and down buttons to change the air pressure, and it will be recorded and time-stamped. To record the compass heading, press the middle button. You can see a log if you long-press on the select button. To reset the timer and clear the log, double-press the select button. Every five minutes it will vibrate to remind you to log the air pressure.