The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From chris srch:
Pocket Pool Boy is a pool calculator in a class of its own! Take the guess work out of maintaining your pool. Pocket Pool Boy with regular use will attempt to learn your pools exact chlorine demand and over time adjust chlorine use. Some users see a drop in chemical usage of up to 30 percent. Pool chemical maintenance has never been this easy.Pocket Pool Boy monitors and charts:Free ChlorineTotal ChlorinepHAlkalinityStabilizerCalcium hardnessCurrently this software is limited to the following chemical additives:9-12 percent liquid ChlorineDry Cyanuric acid (Stabilizer)Dry Sodium BicarbonateMuriatic acidCalcium Chloride