MacWorld’s Rob Griffiths, a certified scuba diver, recently reviewed a new scuba software product for your iPhone.  It is a simple and easy to use dive planner developed by PunkStar Studios.  It basically works with 3 slide bars, Pressure, Depth and Dive Time.  Sound familiar?  Slide the Pressure bar to your nitrogen level at start of dive, the next bar to the depth and finally to minutes down and there you go.  You can download this program though iTune Music Store (link above) for only $2.99.