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. Most 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 ChlorideThis App does not contain IAP but does contain a rare ad on launch and a single banner ad.