poolcntrl: Pool Maintenance

Take care of your own pool without becoming a chemist. poolcntrl reads your water test, remembers your pool, and tells you exactly what to add and when — so you stop guessing and start swimming.

EVERYTHING UNLOCKED FOR TWO WEEKS, NO CARD

Create an account and the whole product is yours for two weeks — history, trends, reminders, weather alerts, strip scanning, photo diagnosis, more than one pool. No card, nothing to cancel if you walk away.

PLUS A FREE CALCULATOR THAT NEVER EXPIRES

Tap "Try it free" on the opening screen. No account, no email, nothing stored. Enter your pool volume and whatever readings you have and get a real dose back — chlorine, pH, alkalinity, stabilizer, calcium hardness, and salt for saltwater pools. It is the same chemistry engine paying subscribers use, it is permanent, and it stays free.

DOSING YOU CAN ACTUALLY MEASURE

• Amounts in real containers — "about half a gallon jug," a number of tabs, cups — instead of decimals of a pound.
• Dosed against your jug. Tell poolcntrl the strength printed on the bottle in your garage and the amount changes to match. A 12.5% jug and a 10% jug are not the same instruction.
• "Why this amount?" opens the arithmetic on any recommendation — your volume, your target, and the rounding.
• The right order, and the wait time between one chemical and the next.
• Safety limits built in. When readings are implausible or unsafe to act on, the app declines to give a dose and tells you why instead of guessing.
• Deterministic by design: the same readings always produce the same answer, from a versioned chemistry engine. Never written by AI.

BUILT FOR PEOPLE WHO ARE NEW TO THIS

• A first-run checklist that walks you from empty app to your first dose.
• Tap any acronym — FC, TA, CYA — for a plain-language definition, in place.
• Sliders with your pool's target range drawn on the track, so you can see healthy before you know the jargon.
• Knowledge Base built in: how a water test works, what each reading means, what each chemical does, how to add chemicals safely, pool types, equipment, and closing and opening your pool.

SAVE A POOL AND IT KEEPS UP WITH YOU

• Trace your pool on satellite imagery to get its volume, or enter dimensions by hand.
• Reminders that arrive on time: when to retest, when a shock is due, when the floater needs tabs, and when the weather is about to change your water. Every category can be turned off on its own.
• Log what you added, and poolcntrl checks your next test to see whether it actually worked. When the water didn't move the way it should have, you get the most likely reasons ranked in plain language.
• Weather-aware guidance — heat waves, heavy rain, cold snaps and freeze alerts.
• Seasons handled: guided closing and opening checklists, and a nudge when it's time.
• Trends for every reading across 30 days, 90 days, the season, or all of it.
• Salt and saltwater generator guidance wherever salt appears.
• Photos attached to a test, chemical and maintenance logs, and more than one pool.
• Your history is yours: download it as CSV from poolcntrl.com.

WHEN YOU'D RATHER JUST ASK SOMEBODY

An in-app assistant answers questions about your water, your equipment, the app, and your account. It explains, and points you at your own numbers. It never prescribes a dose.

AI READS. CHEMISTRY DECIDES.

AI reads a test strip from a photo and helps diagnose what it can see in your pool, always with a confidence score, and it says so plainly when a photo doesn't show enough. AI never prescribes dosing. Every dose comes from the chemistry engine.

AFTER TWO WEEKS

poolcntrl Pro is $5.99/month or $49.99/year. Cancel anytime in your Apple ID settings. If you don't subscribe, the free calculator above is still there — permanently, and still without an account.

poolcntrl is for residential pool owners. Always follow the instructions printed on the product label.

Terms of Use (EULA): https://poolcntrl.com/terms
Privacy Policy: https://poolcntrl.com/privacy