Pricing
$5.99 a month, or $49.99 a year.
Free is genuinely free and permanent — it is just not a place to keep your pool. Pro is where poolcntrl remembers your water and does the thinking between tests.
Every new account gets a 2-week free trial — the whole app, nothing held back, no card needed. Subscribe when it ends, or don’t: the dosing calculator stays free forever, with or without an account.
One subscription, every device — phone at the pool, laptop at the kitchen table.
What you get on each plan
| Feature | Free | Pro |
|---|---|---|
| Dosing calculatorEnter your readings, get exact product-based dosing from the same server-side chemistry engine the app uses. Unlimited, no account, no time limit — it just does not remember anything between visits. | yours forever — no account, no limit | |
| Create an accountSign up and sign in on the app or the web companion. Free, and it stays free. | free to make, and it stays free | |
| Save your property and poolStore the pool itself — volume, surface, sanitizer, equipment — so every later reading is measured against your water instead of a generic pool. | nowhere to keep your pool between visits | |
| Recommendations & dose loggingTurn a saved water test into an exact dose for the products you actually own, then log what you added so the next recommendation accounts for it. | the free calculator still gives you the dose — logging it needs an account | |
| Water test historyEvery test, dose and maintenance entry kept and searchable, with follow-up outcomes attached to the recommendation that caused them. | needs an account that keeps your data | |
| Trends over timeCharts of how each reading has moved, so you can see a drift before it becomes a problem. | nothing is saved, so there is nothing to chart | |
| Reminders & notificationsRetest reminders on your pool’s own cadence, plus weather and filter notices — pushed to your phone. | without a saved pool there is no cadence to remind you about | |
| AI test-strip scanPhotograph a strip and let AI read the pads into a test. AI reads. Chemistry decides. | every scan is a real AI call we pay for | |
| AI pool diagnosisPhotograph cloudy or discolored water and get a likely cause with what to check next. Guidance, never a prescription. | photo diagnosis is an AI call we pay for, every time | |
| Weather forecastsLocal forecast alongside your pool, so heat, rain and storms show up as advice before they show up in your water. | needs a saved address to forecast for | |
| Multiple pools & propertiesEvery pool and property you look after, kept in one account under your plan. | starts with the first pool you save |
One subscription covers every pool and property on your account today — there is no per-property charge. Tiered add-on pricing for additional properties is something we plan to introduce later; if that ever changes, it will be announced before it applies to you.
“The pool store tests my water for free.”
True — and it is a good deal. The test costs nothing, a real person reads it, you get your numbers the same day, and if you have been going a few seasons they know your pool and they know your water. Nothing below is an argument for not going.
It is a good test. It is just not a system, and three things follow from that.
- The test is free because it sits at the front of the chemical aisle.That is not a trick — it is how a store keeps the lights on. But the person reading your sample also sells the answer, and you cannot fully separate the two. poolcntrl sells no chemicals, links to no retailer and takes no commission on anything it tells you to add. The subscription is the only thing we sell, which is why the engine is free to tell you the least profitable answer there is: nothing, your water is fine.
- You test when the store is open, not when your water changes.Saturday at ten is the store’s cadence, not your pool’s. poolcntrl reads the test you just took and sets the next one from what it found — a few hours after a chlorine correction, about a week when nothing needs fixing — and it tells you on your phone instead of waiting for you to remember.
- Nothing is written down between visits.Next Saturday’s sample turns up with no memory of last Saturday’s, so every trip starts from zero and so does the advice. poolcntrl keeps every test, dose and note against your pool, and measures your next reading against the dose you logged — so you find out whether what you added actually worked, rather than guessing again.
So keep going to the store. A second opinion on your water is never a bad thing, and a counter test is a good way to check a strip you are unsure about. This is for the other six days — when the counter is closed and the water is changing anyway.
Ready when you are.
Try the calculator first if you like — it uses the same chemistry engine as the app. When you want poolcntrl to remember your pool, the trial is a tap away.
And it goes quiet in the off-season: mark the pool closed and the reminders stop until you reopen, so a year of poolcntrl is never a year of being nagged about water under a cover.
Neighbours with pools? Refer them. They enter your code when they sign up, and every friend who goes on to subscribe earns you a free month — applied automatically, or held until your next uncovered month if you are already subscribed. Nothing is wasted, and there is no limit.
Download the appYour 2-week free trial needs no card and charges nothing — when it ends, access simply returns to the free calculator unless you subscribe. Subscriptions are purchased inside the app through your App Store account, not on this website. Prices shown are in US dollars; your store may show local pricing and taxes. New subscriptions also start with the App Store’s own 2-week free trial before the first charge. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends, and you can cancel any time in your App Store settings.