# PoolFu - Pool & Spa Chemistry — Chemical Dosing Calculator > Advanced pool and spa water chemistry calculator and care system. (iPhone/iPad app by CyberHost LLC.) - Source: https://appshunter.io/ios/app/poolfu-pool-and-spa-chemistry/id6756633198 (this page in markdown: same URL + `.md`) - Developer: [CyberHost LLC](https://appshunter.io/developer/1846121436) - Category: Utilities, Reference - Price: Free with in-app purchases - Rating: 4.30/5 from 4 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 101 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2026-03-17 - Data updated: 2026-08-01 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/poolfu-pool-and-spa-chemistry/id6756633198/reviews.md ## What is PoolFu? PoolFu is a complete pool and spa care system that tells you exactly what and how much to add, and when your water is safe to use. It goes beyond a simple pool chemical calculator by checking how your readings, equipment, surface, weather, and history affect each other before giving clear recommendations for safe, clean, crystal-clear water. You can go as deep as you like, or just follow the recommendations. Basic pool calculators treat each reading in isolation. PoolFu considers how everything works together with as a unified system. A saltwater generator can push pH upward. Total alkalinity affects pH stability. CYA changes the meaning of your chlorine level. Temperature changes how heated pools and spas behave. Note: PoolFu requires a subscription to use. Every new account includes a 14-day free trial, and you can cancel anytime during the trial. No trial is available for Pro subscriptions. PoolFu works offline when you need it, and keeps your pools, spas, tests, and history synced across devices. SAFER WATER GUIDANCE PoolFu tells you whether your pool or spa is safe to use, needs caution, or should stay closed for now. If sanitizer is too low, a chemical combination is risky, or a recovery plan needs time to work, PoolFu explains the reason before anyone gets in the water. SMARTER DOSING Every recommendation tells you what to add, how much to add, and why. PoolFu coordinates chlorine, pH, alkalinity, calcium, stabilizer, salt, temperature, surface, equipment, and recent test history, so one correction does not create another problem. ASK SPLASH Ask Splash questions like: Why is my pool cloudy? What does CYA do? Is it safe to swim right now? Splash uses your pool or spa profile, recent readings, equipment, and history to answer in plain language. HEALTH SCORE See one clear score from 0 to 100 showing where your water stands. PoolFu weighs the full chemistry picture, tracks trends, and uses water balance analysis to flag corrosive or scale-forming conditions. HOT TUBS AND SPAS PoolFu supports spa-specific chemistry, bromine guidance, drain-and-refill flows, and over 1,700 hot tub models from 160+ brands. Your spa model helps PoolFu give more specific water-care guidance instead of generic hot tub advice. SALTWATER POOLS PoolFu includes specs for 616 saltwater generator models from 129 manufacturers, with model-specific salt targets, output guidance, pH drift handling, and sanitizer behavior. WEATHER-AWARE Real-time conditions, freeze warnings, and rain correlation help PoolFu understand why your water changed. If salt drops after a storm, PoolFu connects the dots. TRUST No ads. No chemical company sponsors. PoolFu recommends what your water actually needs, based on real chemistry, not what a brand wants to sell you. MULTI-LINGUAL PoolFu supports English, Spanish, Portuguese, German, Italian, French, Chinese (Simplified and Traditional), and Japanese. FOR POOL SERVICE PROFESSIONALS PoolFu Pro is also available as a separate monthly subscription for pool service businesses. Manage customers, pools, spas, visits, photos, videos, service notes, recurring schedules, branded PDF reports, and chemical inventory from one place. Start a visit, test water, apply treatments, log geotagged media, and check out with a workflow that helps prevent data from being saved to the wrong pool. Track truck inventory and personal chemical products from 2,721 chemicals across 180+ brands, so PoolFu can reference your actual products in every dosing calculation. Master your water. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple ID account at confirmation of purchase. Manage or cancel anytime in Apple ID settings. Terms of Use (EULA): https://poolfu.app/terms/ Privacy Policy: https://poolfu.app/privacy/ ## Key features - Dosing calculator - Water safety guidance - Health score - Spa-specific chemistry - Saltwater generator support - Weather-aware recommendations - Offline functionality ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Annual | $53.99 | per year | | Monthly | $5.99 | per month | | Pro Monthly | $29.99 | per month | | Pro Annual | $269.99 | per year | ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/poolfu-pool-and-spa-chemistry/id6756633198/reviews.md ### 5/5 — Excellent accuracy *2026-05-29* Just a great app all around really. I use this for my pool and it’s incredibly accurate and I love the recommendations. It’s nice how it tells you what to do first this is something that’s always stumped me when I’m dealing with multiple things. **Developer response:** Thank you for the kind words and 5-star review. We hope you are still enjoying using the app! ### 5/5 — Awesome app! *2026-05-29* PoolFu helps enormously with my pool maintenance, and I love that it actually explains the why behind everything. Thank you for making it so good! ### 5/5 — Gamechanger *2026-05-28* I just switched from another pool calculator app. First big difference I see is the UI is designed really well. I use Poolfu for both my pool and hot tub, and the recommendations are on point. It took me a little getting used to, but so far I’m very happy with this app. ### 5/5 — Great Spa Testing App! *2026-05-22* This app has been amazing and has exceeded my expectations. I use it when testing my hot tub, I log the results and follow the guidance. It tells me exactly what’s required and how to balance the water correctly. So easy to use and follow, and it’s great having all of the spa information and test history in one place. The achievements awarded in the app are fun too, thanks Splash! ;) ### 5/5 — Incredibly easy to use, very impressive *2026-03-23* I’ve been using this for about a week now and I’m absolutely blown away by it so far. It seems to get every treatment recommendation spot on. Well, worth the subscription. **Developer response:** Thank you for the kind words and 5-star review. We hope you are still enjoying using the app! ## Frequently asked questions about PoolFu ### What is the free trial period for PoolFu? Every new account includes a 14-day free trial for the standard PoolFu subscription. You can cancel anytime during the trial period. Pro subscriptions do not offer a trial. ### Does PoolFu have ads? No, PoolFu is ad-free. The app states it has no ads and no chemical company sponsors, focusing solely on providing accurate recommendations based on water chemistry. ### What devices does PoolFu support? PoolFu is available for iPhone and iPad devices. It also keeps your pools, spas, tests, and history synced across devices. ### How often is PoolFu updated? The latest version of PoolFu is 1.0.7, and it was last updated on June 3, 2026. This indicates a recent update, suggesting ongoing development and support. ### What is the age rating for PoolFu? PoolFu has an age rating of 4+. This means it is considered suitable for children aged 4 and above, with no mature content concerns. ### Can PoolFu be used offline? Yes, PoolFu works offline when you need it. This feature ensures you can access its water chemistry analysis and recommendations even without an internet connection. ### What languages does PoolFu support? PoolFu is a multi-lingual application, supporting English, Spanish, Portuguese, German, Italian, French, Chinese (Simplified and Traditional), and Japanese. ### How does PoolFu calculate water safety? PoolFu determines water safety by analyzing your pool or spa's readings, equipment, surface, weather, and history. It provides clear recommendations on whether the water is safe to use, requires caution, or should remain closed. ## Version history (last 5 releases) ### 1.1.0 — 2026-07-30 What's new in PoolFu Supplemental sanitizer support for spas - New Supplemental Sanitizer setting for spas with a UV, active oxygen (AOP), or nanobubble system - Chlorine guidance adjusts to the lower level these systems run: a 3 ppm target, with 2 to 3 ppm counting as acceptable between soaks - Bromine spas adjust from 5 ppm to 4 ppm - Safety limits are unchanged: below 2 ppm chlorine is still critical, and bromine keeps its 4 ppm minimum before anyone gets in Spa chlorine dosing - Spas now dose to a 4 ppm target, the middle of the 3 to 5 ppm ideal range - Dose amounts for chlorine spas change slightly Export from the calendar - Added Export Data to the history calendar for your own pool and spa - Exports test readings and treatments as CSV spreadsheets, or a full PoolFu backup Product filtering - Products now filter by category, brand or common chemical, and region from a single Filters button - Active filters show as tags you can tap to remove - Search now respects your filters, and finds products sold in other regions - Common chemicals expanded to 26 entries, including calcium hypochlorite shock and liquid chlorine - Added 172 Lawrason's products including Aqua, for Canada Retest reminders - Pools now wait 4 hours after adjusting pH with acid, and until the next morning after a shock - Hot tubs keep their faster 1 hour and 6 hour reminders - Spas with a supplemental sanitizer are reminded to test every 3 days Pro data after cancellation - Pro features stop when a Pro subscription ends, but nothing you built with Pro is deleted - Added a Your Pro Data screen showing what is stored, with a backup or spreadsheet of each customer, and a button to resubscribe and pick up where you left off Other improvements - Added haptic feedback when you save a test, log a treatment, unlock an achievement, or finish a service visit - Added a Done button to the keyboard on the Test Water screen - Cleaned up the Settings screen - Shared reading and achievement cards render at higher resolution ### 1.0.9 — 2026-06-17 PoolFu's latest update adds water clarity, smarter algae recovery, safer water-use guidance, more accurate history, and clearer subscription and Pro messaging. See what the water looks like - Add water clarity to pool tests with Crystal Clear, Slightly Hazy, Cloudy, Green Tint, or Green - Health Score now accounts for green or cloudy water, so a visibly green pool cannot read perfect - Clarity appears on pool cards, current readings, and calendar history A real green-to-clean recovery plan - Green water with low chlorine now gets a SLAM recovery plan with exact liquid chlorine dosing - PoolFu explains the hold-and-maintain process, brushing and filtering, and the three exit checks - Metals are handled first so high chlorine does not drive staining Clearer water-use safety - Do Not Use and Use Caution banners now combine chemistry and visible clarity - Green water, high or low sanitizer, high combined chlorine, and unsafe pH point to one safety message - High chlorine during SLAM is treated as a hold-and-retest state, not another shock dose Better history and reports - Past tests, service reports, exports, trend dots, and score charts now score each reading as it was on that day - Calendar day details scroll more smoothly and stay current after sync - Back-dated and edited tests show the correct test date Subscription and Pro polish - Restore Purchases can recover access after a legitimate PoolFu account change on the same Apple ID - Trial messaging now matches App Store eligibility - Pro now clearly highlights 300 Splash AI messages/month, reports, routes, customers, service logging, and truck inventory Fixes and refinements - More chemistry and safety guidance is translated across all supported languages - Chlorine ranges now follow stabilizer/CYA more consistently - Green to Clean now only unlocks after a real recovery, not a single caution reading or mid-SLAM hold ### 1.0.8 — 2026-06-05 La dernière mise à jour de PoolFu vous aide à conserver un historique plus complet et précis de votre piscine ou spa, avec la journalisation des traitements, des relevés modifiables, l'exportation et l'importation de données, un écran de connexion plus épuré, une navigation plus rapide et une meilleure mise en forme régionale. Un indice de santé de l'eau plus clair - L'indice de 0 à 100 évolue désormais de façon fluide sur toute l'échelle - Il se concentre sur une seule chose : la qualité de votre eau en un coup d'œil - Une eau parfaite obtient toujours 100 Consignez chaque traitement, directement dans votre calendrier - Enregistrez des traitements manuels, d'un seul produit chimique à un ensemble complet de traitements, avec des notes - Voyez les traitements à côté de vos tests d'eau, avec des relevés avant et après pour suivre ce qui a changé - Définissez un rappel facultatif pour refaire un test et lancez directement un nouveau test le moment venu Modifiez et complétez votre historique - Modifiez des relevés existants, changez la date et l'heure d'un relevé ou supprimez des relevés antérieurs - Ajoutez des tests manuellement, même pour une date passée Exportez et importez vos données (Paramètres > Données) - Exportez une sauvegarde complète ou une feuille de calcul de vos relevés et traitements, pour que votre historique vous appartienne toujours : à conserver, à déplacer ou à partager - Importez une sauvegarde, avec un aperçu clair avant tout changement, pour restaurer vos données sur un nouvel appareil ou compte Un nouvel écran de connexion plus épuré - L'expérience d'accueil et de connexion adopte un design plus simple et plus soigné - PoolFu utilise désormais par défaut la préférence de votre système pour le mode clair ou sombre Améliorations des performances - L'accueil, la piscine et le spa, l'historique et les tendances s'ouvrent plus rapidement et défilent plus fluidement - Les recherches volumineuses d'équipements et de produits se chargent maintenant en arrière-plan pour que vous puissiez continuer sans attendre Prise en charge régionale améliorée - La température s'affiche maintenant en Celsius ou en Fahrenheit selon votre réglage, dans toute l'application - Les précipitations sont indiquées en millimètres pour les utilisateurs du système métrique - La saisie des nombres accepte désormais la virgule comme séparateur décimal, comme c'est l'usage dans une grande partie de l'Europe Correctifs et raffinements - Corrections mineures de bogues pour la version 1.0.8 : les relevés modifiés n'étaient pas enregistrés pendant l'aperçu et avant l'inscription. Les utilisateurs inscrits n'étaient pas touchés. ### 1.0.7 — 2026-06-03 PoolFu's latest update helps you keep a more complete, accurate history for your pool or spa, with treatment logging, editable readings, data export and import, a cleaner sign-in screen, faster navigation, and better regional formatting. A clearer water Health Score - The 0-100 score now moves smoothly across the whole range - It focuses on one thing, how good your water is at a glance - Perfect water still scores 100 Log every treatment, right on your calendar - Record manual treatments, from a single chemical to a full set of treatments, with notes - See treatments beside your water tests, with before-and-after readings so you can track what changed - Set an optional retest reminder and jump straight into a new test when it's time Edit and fill in your history - Edit existing readings, change reading date and time, or delete prior readings - Manually add tests, even for a past date Export and import your data (Settings > Data) - Export a full backup or a spreadsheet of your readings and treatments, so your history is always yours to keep, move, or share - Import a backup, with a clear preview before anything changes, to restore your data on a new device or account A cleaner new sign-in screen - The welcome and sign-in experience has a simpler, more polished design - PoolFu now defaults to your system preference for light or dark mode Performance improvements - Home, pool and spa, history, and trends open faster and scroll more smoothly - Large equipment and product searches now load in the background so you can keep moving Improved regional support - Temperature now appears in Celsius or Fahrenheit based on your setting, throughout the app - Rainfall uses millimetres for metric users - Number entry now accepts a comma as the decimal point, as used across much of Europe ### 1.0.6 — 2026-05-27 What's new in PoolFu: Safer water guidance PoolFu tells you whether your pool or spa is safe to use, needs caution, or should stay closed for now, with clear reasons and a recovery plan. Smarter dosing decisions PoolFu now handles tricky chemistry situations more carefully, including high pH with low alkalinity, persistent pH rise in saltwater pools, and chlorine targets at any stabilizer level. Better hot tub support Spa guidance now better reflects how hot tubs behave, including pH, foam, non-chlorine shock, and bromine spas. Bromine guidance now uses a 4 to 8 ppm acceptable range. Clearer recovery plans PoolFu now separates immediate, deferred, and optional steps, so you can see what matters first and what can wait. Indoor pool refinements Indoor pools no longer show seasonal winterization controls, and PoolFu now cleans up older indoor-pool settings automatically. Fixes and polish Pool and spa videos imported from your photo library now keep their original format, service media cleanup is more reliable, and chemistry explanations have been refined throughout. ## More apps by CyberHost LLC - [Awakening: Binaural Meditation](https://appshunter.io/ios/app/awakening-binaural-meditation/id6753984914) All apps by CyberHost LLC: https://appshunter.io/developer/1846121436 ## Related topics [calculadora para piscinas gratis](https://appshunter.io/ios/topics/calculadora-para-piscinas-gratis) --- *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 2026-08-01.*