PoolDose: Pool Care Calculator

Test your water, type the numbers, get exact doses. PoolDose is a pool chemistry calculator and log built for pool owners who do their own maintenance — and who are tired of subscriptions, forced accounts and paywalled basics.

EVERYTHING THAT MATTERS IS FREE, FOREVER
• Full pool chemical calculator: free chlorine, pH, total alkalinity, calcium hardness, cyanuric acid (stabilizer), salt and saturation index (CSI/LSI)
• Unlimited test log and chemical-addition log — not 1 entry, not 30 days. Unlimited, free, forever
• Works completely offline. No account, no sign-up, no email. Your data stays on your phone
• Chlorine, salt water and bromine pools and hot tubs from day one
• US and metric units (gallons/oz/°F or liters/grams/°C)

DOSES YOU CAN TRUST
Every formula is anchored to published industry values — the same numbers trusted pool references use. Pick the exact product you pour (liquid chlorine 10% or 12.5%, bleach, cal-hypo, dichlor, trichlor, muriatic acid 31.45% or low-fume) and PoolDose converts to real-world amounts, including the side effects other apps hide: how much CYA your trichlor adds, how much your acid drops alkalinity, capped pH corrections with retest guidance.

YOUR POOL, YOUR TARGET RANGES
Follow the TFP method (FC tied to your CYA), classic industry ranges, or edit any minimum, target and maximum yourself. The app adapts to how you maintain your pool — not the other way around.

YOUR DATA IS YOURS
• One-tap CSV export of your whole history, spreadsheet-ready
• Reliable CSV import that never silently corrupts a log
• Full JSON backup and restore for phone migrations
• Automatic local backup with self-healing storage

ONE UNLOCK, NO SUBSCRIPTION
The calculator and unlimited log are free forever. A single one-time purchase unlocks the extras: multiple pools and spas, trend charts with your target band, maintenance reminders (test water, backwash, clean the filter) and a formatted PDF water report. Buy it once, it is yours.

Made for DIY pool owners, salt water pool owners, hot tub and spa owners, and anyone who wants a pool test log and pool chemical calculator that respects their time and their wallet.