Pool Chem – Calculator & Log

Test your water, type the numbers, get exact doses. Pool Chem tells you precisely how much of each chemical to add — and keeps your whole test history on your device.

EXACT DOSING • Free chlorine: liquid chlorine (any strength), cal-hypo, dichlor, trichlor — with CYA/CH side-effect warnings • pH: muriatic or dry acid amounts computed with real carbonate-buffer chemistry (not a rough chart) • Alkalinity, calcium hardness, stabilizer and salt doses in oz / lb / gallons • CSI (saturation index) so plaster doesn't etch and heaters don't scale • FC targets that follow your stabilizer (CYA) level • Chlorine, saltwater (SWG) and bromine pools

YOUR LOG, YOUR DEVICE • Unlimited test logging — free, forever • Partial tests welcome: log only what you measured • Data stays on your device. No account. No cloud. • Export everything to CSV anytime

ONE-TIME PURCHASE The free version is a complete calculator with unlimited logging for one pool. Pool Chem Pro is a single one-time purchase that adds unlimited pools, trend charts, CSV export and custom targets.

No subscription. No ads. No feature removals. Ever.

Always follow chemical product labels. Add, circulate, retest.