PoolChem: Pool Calculator LSI

PoolChem is the offline pool calculator, LSI calculator and pool chemistry calculator built for pool service techs and hands-on pool owners. Get a CYA-aware pool LSI reading, then dose with confidence.

CYA-CORRECTED LSI, NOT A TOY
Most LSI calculators ignore stabilizer. PoolChem subtracts CYA from total alkalinity before it computes the Langelier Saturation Index, so the number you act on matches the water you are standing in front of.
• Dual NOW and TARGET sliders for FC, pH, total alkalinity, calcium hardness, CYA, temperature and TDS / salt.
• Live current and target LSI on one gauge, plus effective carbonate alkalinity.
• Corrosive, balanced and scale-forming bands with plain-language status.
• One-tap auto-balance that keeps in-range CH, CYA and salt where they are.

EXACT DOSES AND REAL COST
• Liquid chlorine 12.5% or 10%, muriatic acid, soda ash, baking soda, calcium chloride, stabilizer and pool salt.
• Doses shown in fluid ounces, pounds, bags and gallons, scaled to the pool's actual volume.
• Cost per stop using the prices you pay, or hide costs from the client report.
• When CH, CYA or salt is too high, PoolChem recommends a partial drain instead of a fake chemical fix.

A DOOR-HANGER CLIENTS KEEP
• One-page letter PDF with the readings, LSI, service checklist and chemicals added.
• Send by SMS or WhatsApp, or print it on site.
• Company name, technician, certification and phone are printed on every report.

BUILT FOR THE ROUTE
• Client pools with address, phone, gate code, surface, volume, salt or chlorine and route day.
• Filter PSI baseline per pool with a backwash warning when pressure climbs.
• Route checklist and test history for every stop.
• Light theme for direct sun, dark theme for dusk and night calls.
• Monthly pool count, test count and chemical spend on the dashboard.

WORKS OFFLINE
No account, no signal and no waiting on a server. Pools and tests live in a local database on your phone.

FREE PLAN
• 3 client pools.
• 1 door-hanger PDF export.
• The full LSI lab, dosing engine and volume calculator.

POOLCHEM PRO
• Unlimited client pools and route logs.
• Unlimited door-hanger PDF exports.
• Free trial available. Cancel anytime in Google Play.

VOLUME CALCULATOR
Rectangle, round, oval and kidney / freeform pools, using length, width, shallow and deep ends.

PoolChem is a field calculator and documentation tool. Chemical doses are estimates based on the readings you enter. Always follow the product label, local regulations and manufacturer instructions, and never mix chemicals. Verify critical results before treating a pool.