PoolDose: Pool & Spa Dosing

The pool & spa app that never refuses your water — bromine, Baquacil, salt, tiny spas — with a test log that stays yours. One-time price, no subscription.

Test your water. Know exactly what to add — and keep the record forever.

PoolDose turns your test readings into the one thing you actually need: exactly how much of which product to add, right now, in your units, for your body of water. There's no calculate button — the dose re-solves live as you type. And every test you log stays in a plain local file that is yours forever.

WATER THE OTHER APPS REFUSE Most pool apps quietly assume a mid-size chlorine pool. PoolDose doesn't. On ONE instrument, with no separate "modes," it doses: • Chlorine, bromine, biguanide (Baquacil) and salt / SWG — the sanitizer is a parameter you set, not a locked menu • Any volume — a 250-gallon inflatable spa and a 40,000-gallon pool are the same input; under 1,000 gallons is never gated • Your real products — edit any concentration (12.5% liquid chlorine, 9.6% French Javel, an off-label MPS shock) and the app does honest math on the actual strength Adding a chlorine product to a Baquacil pool is refused with a safety warning — a fact of chemistry, held even for systems the app was never pre-programmed for.

YOUR LOG IS NEVER HELD HOSTAGE History is the whole point, so history is the data model — not a feature bolted on. Every reading and dose lives in a plain local file on your phone. Export it to JSON anytime and import it back — moving to a new phone is a file, not a login. No account, no cloud, no subscription that could hold your years of records ransom.

IT LEARNS YOUR POOL — HONESTLY Log a few tests and PoolDose measures your pool's own behavior from your data: how fast it burns sanitizer, how pH drifts back, how CYA or salt creep up — and it bends today's dose accordingly. Not enough history yet? It says so, and works as a straight solver. It never invents a trend it can't see.

WHAT'S FREE, WHAT'S NOT Free, forever: today's exact dose for one body of water — any sanitizer, any volume — plus water balance (LSI/CSI), and export of your own data. One-time unlock ($19.99): the compounding ledger — full saved history and trends, your pool's measured dynamics, unlimited bodies of water, and importing old logs. That's it. No subscription. No account. Restore Purchases is built in. Export is always free — your data is never held.

Always follow your product's label and confirm against your own test kit. PoolDose supports your dosing decisions; it isn't medical or professional advice.