# poolcntrl: Pool Maintenance — Chlorine & pH dose calculator > Pool water chemistry calculator and maintenance guide. (iPhone/iPad app by Anthony Lacey.) - Source: https://appshunter.io/ios/app/poolcntrl-pool-maintenance/id6767749773 (this page in markdown: same URL + `.md`) - Developer: [Anthony Lacey](https://appshunter.io/developer/1896505868) - Category: Lifestyle, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 15.1 · 76 MB - Languages: American English - Released: 2026-07-31 - Data updated: 2026-08-29 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/poolcntrl-pool-maintenance/id6767749773/reviews.md ## What is poolcntrl? 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 ## Key features - Exact chemical dosing calculations - Guidance on product amounts and order - Retesting schedule reminders - Free water test calculator - Weather-aware maintenance advice - Pool opening and closing checklists - Chemical and maintenance logging ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | poolcntrl Pro (Monthly) | $5.99 | per month | | poolcntrl Pro (Annual) | $49.99 | per year | ## Frequently asked questions about poolcntrl ### Does poolcntrl have ads? No, poolcntrl is ad-free. The free calculator requires no subscription or account, and the app does not contain advertisements. ### What is the cost of poolcntrl Pro? poolcntrl Pro is available for $5.99 per month or $49.99 per year, with a 7-day free trial for both plans. You can cancel anytime through your Apple ID settings. ### What pool readings does poolcntrl calculate doses for? poolcntrl calculates exact doses for chlorine, pH, alkalinity, stabilizer, calcium hardness, and salt for saltwater pools based on your entered readings. ### Can poolcntrl help with pool opening and closing? Yes, poolcntrl Pro includes guided checklists for opening and closing your pool, and provides nudges when it's time to perform these seasonal tasks. ### Does poolcntrl use AI for dosing calculations? No, poolcntrl uses a versioned chemistry engine for deterministic dosing calculations. The same readings will always produce the same answer, and it is not written by AI. ### What happens if my pool readings are unsafe? If your readings are implausible or unsafe, poolcntrl will decline to give a dose and will instead explain why it cannot provide guidance, prioritizing safety. ### What devices does poolcntrl support? poolcntrl is supported on iPhone and iPod devices. It is designed for residential pool owners. ### How often is poolcntrl updated? The latest version of poolcntrl is 1.1.0, last updated on August 7, 2026. Updates are released to improve functionality and reliability. ## Version history (last 4 releases) ### 1.2.2 — 2026-08-19 How much water to drain, in a number When stabilizer is too high to dose around, the app no longer just says a partial drain may be needed. It gives you the percentage, sized from your own reading and your own target - and when that is more than is safe to drain at once, it lays out the rounds: drain about a quarter, refill, retest, repeat. An acid amount even without an acid-demand test High pH used to produce a number only if you had found the acid-demand field. Now everyone gets one, clearly labeled as an estimate rather than a measurement. It is set deliberately low, so you start there and retest, and it tells you how much your alkalinity comes down with it. If the alkalinity step already has you adding acid, there is no second dose - the card explains why instead of going quiet. Safe to swim after ___ One banner above your steps answers the only question most people have. It uses the longest wait that applies, so you are not combining 4 hours, 24 hours and a week in your head. Where the wait genuinely depends on a retest, it says so rather than inventing a number. A beat before a big dose When a shock-level dose lands alongside a safety warning, the dose list waits for one deliberate tap. The warning stays on screen the whole time - nothing is hidden, you are just asked to read it first. Refer a Friend and instant answers, in Account Both were built and both were hard to find. The referral screen and the ask-anything support assistant now have their own rows in Account. And "What I use" is now "Chlorine & acid I use", so the row names what it sets. Text that fits its screen The sign-in screen no longer paints past its own boxes after you sign out, and long titles no longer overprint the back button or the logo. The testing habit card, sooner and smarter The Dashboard's testing pulse used to stay hidden through your entire first loop - exactly when the rhythm is being formed. It now appears from the start, and the last-test date turns amber when you are due and red once a reading is too old to dose from. Sign-up tells you the truth Signing up with an address that already has an account now offers you sign-in and password reset, instead of sending you to check an inbox for an email nobody sent. Log what you actually did Logging a recommendation now opens a checklist: check off what you added, change any amount to what you really poured, and only then does it save. Your next test is judged against what you actually added — a dose you knowingly halved is never scored as a failure. Warnings beside your dose, not instead of it When something needs checking — stabilizer over its ceiling, say — the app now shows the warning above your plan instead of refusing to show a plan at all, and the same rule holds on the website and the free calculator. Only a reading the engine truly can't act on stops the dose. The log button stays put Logging is what starts every reminder, retest and trend, so it's now pinned to the bottom of the recommendation screen instead of hiding below the scroll. Your history is yours Download every water test and dose as a CSV, straight from the pool's options sheet. The saturation index, for everyone The free no-account calculator now shows the same water-balance verdict subscribers see. Know exactly what you're paying Account settings now spells out your plan, the price, the renewal date, and where to cancel — in plain English. Referrals show their math Banked months, pending rewards, and friends joined now appear on the Refer a Friend screen, matching the website. More to read, right in the app The built-in Knowledge Base now carries the same library as poolcntrl.com/learn. Also: a gentle testing-habit pulse on the Dashboard, both season checklists reachable again, a failed sign-up can simply be retried, and the paywall is upfront about the price. ### 1.2.0 — 2026-08-13 The free tier is gone, and that is good news. Everything, for two weeks A new account now gets the whole app for two weeks — history, trends, reminders, weather, strip scanning, photo diagnosis, more than one pool. No card, nothing to cancel. Previously the free tier locked you out on your very first test; now you get the whole loop before deciding anything. The no-account calculator is unchanged and still permanent. Dosed against your jug, not a generic one 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 were never the same instruction, and low-fume muriatic is less than half the strength the old formulas assumed. Why this amount? Every recommendation now opens to show its arithmetic — your volume, your target, the math, and where the rounding went. Somebody to ask A new 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. Made for people who just got a pool A first-run checklist that takes you from empty app to first dose. Tap any acronym — FC, TA, CYA — for a plain-language definition without leaving the screen. Learn articles now reachable from the dashboard, and "Why?" links from the readings themselves. Closing the retest loop "Retest now" straight from History, plus a reminder four hours after a dose, when the water has actually had time to move. Trends worth reading Chart any reading over 30 days, 90 days, the season, or everything you have. Saltwater Salt now appears in every summary that should mention it, with honest generator guidance instead of brand-specific claims. Your data is yours Download your full water-test and dose history as a CSV from the member area at poolcntrl.com. Also: saving no longer interrupts you with a pop-up, the satellite trace asks you to confirm the pool it found, you can resend a confirmation email from the check-your-inbox screen, subscription status reflects what the server actually knows, and the permission prompts finally explain themselves. ### 1.1.0 — 2026-08-07 This update is mostly about what happens after you add the chemicals. Did it actually work? Log what you added, and poolcntrl checks your next test to see whether it worked. When it didn't, you get the likely reasons in plain language — a faded jug of chlorine, a dose that never mixed, rain since the last test. Check my kit Compare your test kit against a trusted reference — a fresh kit or a pool-store reading — and poolcntrl learns how much weight to give your numbers. Every reading now records how it was measured, and how sure you were of it. Smarter strip scanning Strip scans now match pad colors against measured reference colors instead of guessing, for reads you can actually trust. Reminders on their own Retesting, shock, floater refills, and weather headed your way. Keep the kinds you want, turn the rest off. Doses you can measure Amounts come in real containers — "about half a gallon jug," tabs, cups — instead of decimals of a pound. Tabs come with guidance for your feeder, a shock comes with an actual dose, and every screen shows a dose the same way. Weather and seasons Freeze and cold-snap alerts, heat and heavy-rain guidance, and guided closing and opening checklists. A Knowledge Base, built in Plain-language guides on how a water test works, what each reading means, and how to add chemicals safely. A better free calculator The no-account calculator now handles saltwater, total chlorine, and water temperature. Also: readings charted over time, summaries that stay honest when the water isn't, better contrast, bigger touch targets, sign-out that never leaves you stuck, and a long list of pool-side fixes. ### 1.0 — 2026-08-01 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*