# Pool Log — Pool & Spa Chemistry, Solved > Pool and spa water chemistry management with precise dosing and weather-aware tracking. (iPhone/iPad app by Michael Holloway.) - Source: https://appshunter.io/ios/app/pool-log/id6744295287 (this page in markdown: same URL + `.md`) - Developer: [Michael Holloway](https://appshunter.io/developer/877302832) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Rating: 4.70/5 from 6 App Store ratings - Age rating: 4+ - Requires: iOS 26.0 · 11 MB - Languages: American English, French (France), European Spanish - Released: 2026-04-03 - Data updated: 2026-08-19 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pool-log/id6744295287/reviews.md ## What is Pool Log? SKIP THE POOL STORE Stop driving to the pool store for tests that are inconsistent, expensive, and end with someone trying to upsell you chemicals you don't need. PoolLog turns your own test results into precise dosing instructions in seconds — using the same Taylor Technologies and Pool & Hot Tub Alliance formulas the pros rely on. POOLS AND SPAS, ONE APP Manage every body of water from one place. PoolLog handles backyard pools, spas, hot tubs, and rentals — each with its own sanitizer system, surface type, target ranges, and history. Switch between them with a tap. WEATHER-AWARE TRACKING Test results pair with the local weather automatically (no location permission required, just a postal code). Spot the patterns that matter: heatwave chlorine drops, post-rain alkalinity swings, the bather load that always nudges your pH. YOUR DATA. YOUR DEVICE. No account required. Nothing leaves your phone unless you turn on optional iCloud sync — and even then it's only ever between your own Apple devices. Other apps want a login and a cloud account before they'll show you a number. We don't. PREVIEW THE EXACT DOSE Before you add anything, PoolLog shows the precise amount of each chemical you'd need to reach your target — accounting for your pool's volume, current chemistry, and the specific concentration of the product on your shelf. Add the chemical, log the addition, done. GROUNDED IN REAL CHEMISTRY Recommendations come from peer-reviewed industry standards — Taylor Technologies, the Pool & Hot Tub Alliance, and the same CSI formula commercial operators use to keep plaster pools from etching or scaling. We document every formula in the app's references. SLAM MODE FOR ALGAE When the green hits, switch on SLAM (Shock, Level, And Maintain) and PoolLog raises the chlorine target to the appropriate level for your CYA, walks you through the procedure, and resets when you're back to normal. Built for the TFP-style algae recovery the rest of the industry won't talk about. CSI CALCULATION INCLUDED The Calcite Saturation Index tells you whether your water is going to scale (build up calcium deposits) or etch (eat your plaster). PoolLog calculates it from your pH, temperature, calcium hardness, alkalinity, and TDS — and shows it on the dashboard, not buried in a settings screen. EVERYTHING THAT'S IN HERE • Free chlorine, combined chlorine, total chlorine • Bromine sanitizer support (chlorine alternative for spas) • pH, total alkalinity, calcium hardness, cyanuric acid • Salt level with custom ranges per cell manufacturer (Hayward, Pentair, Jandy) • Borates, TDS, water temperature • CSI dashboard tile and history • Chemical addition logging with concentration-aware dosing • Maintenance task tracking — brushing, backwashing, filter cleans, opening/closing • Expense tracking with categories • Beautiful charts for every level • Test reminders that pause when the pool is closed for the season • Imperial / UK imperial / metric units • English, Spanish, and French PREMIUM FEATURES Upgrade to Premium for $0.99/month or $7.99/year: • Multiple pools (free version supports one) • Data export to CSV for spreadsheets and analysis • iCloud sync across your Apple devices • Test strip scanner (coming soon) • Priority support WHO THIS IS FOR Pool and spa owners who'd rather spend their weekend swimming than queueing at the pool store. New owners who want a smart guide. Experienced owners who already know their CYA from their CSI and want a logger that respects that. Privacy Policy: https://blite.github.io/PoolLog/privacy/ Terms of Service: https://blite.github.io/PoolLog/terms/ ## Key features - Precise chemical dosing instructions - Manages multiple pools and spas - Weather-aware test result tracking - SLAM mode for algae treatment - Calcite Saturation Index (CSI) calculation - Chemical addition logging - Maintenance task tracking ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Monthly Plan | $0.99 | per month | | Annual Plan | $7.99 | per year | ## Frequently asked questions about Pool Log ### What is Pool Log? Pool Log is a utility app designed to help pool and spa owners manage their water chemistry. It provides precise chemical dosing instructions based on user-input test results and integrates local weather data to help identify patterns affecting water balance. ### How does Pool Log calculate chemical doses? Pool Log uses established industry formulas from Taylor Technologies and the Pool & Hot Tub Alliance, the same ones used by professionals. It accounts for your pool's volume, current chemistry, and the specific concentration of the chemical product you have. ### Can Pool Log manage multiple bodies of water? Yes, Pool Log can manage multiple pools, spas, and hot tubs from a single interface. Each water body can have its own sanitizer system, surface type, target ranges, and historical data, allowing for easy switching between them. ### Does Pool Log require an account to use? No, Pool Log does not require an account to use. Your data is stored locally on your device for privacy. Optional iCloud sync is available for use across your own Apple devices. ### What is SLAM mode in Pool Log? SLAM mode (Shock, Level, And Maintain) is a feature in Pool Log designed to help users combat algae. It automatically adjusts the chlorine target, guides you through the treatment procedure, and resets once your water is back to normal. ### Does Pool Log have ads? No, Pool Log does not contain advertisements. It is a free application that focuses on providing a clean and uninterrupted user experience for managing pool and spa water chemistry. ### What units does Pool Log support? Pool Log supports Imperial, UK imperial, and metric units for measurements. This allows users to select the unit system they are most familiar with for managing their pool or spa. ### How often is Pool Log updated? The latest version of Pool Log is 0.1.4, last updated on June 12, 2026. While specific update frequency isn't detailed, this indicates active development and maintenance of the application. ## Version history (last 5 releases) ### 1.1 — 2026-08-13 PoolLog is now on Mac, included with your purchase. The same pools, history, and subscription carry over through iCloud. Chemistry fix: • Liquid stabilizer is now modeled correctly as Sodium Cyanurate. Bottles sold as "liquid stabilizer" or "liquid conditioner" are the dissolved salt of cyanuric acid, and they deliver less CYA than the percentage on the front of the label. PoolLog now defaults to the common 28.8% label strength and doses by the actual 22% cyanuric acid equivalent. The previous dose raised CYA about 25% less than expected. Fixes and polish: • The iCloud Sync toggle in Settings now actually turns sync on and off. • Deleting an event from History no longer leaves a stale detail view behind. • The Add Chemical, Record Expense, Log Maintenance, and Add Note screens now use the same card layout as Log Test Results, so every editor looks and feels consistent. • Tapping a maintenance reminder now opens the log with that task already checked. Previously it opened an empty checklist. • Spanish and French translations are now complete throughout the app. Your existing history and chemical preferences carry over automatically. Thanks for using PoolLog. ### 0.1.4 — 2026-06-12 Bug fixes: • Calculated values like CSI no longer show a dozen decimal places in History (0.10000000000000142 is now just 0.1). • CSV export now rounds numbers properly, and water temperature exports in your unit (°F or °C, named in the column header) instead of raw Celsius. Thanks for using PoolLog. ### 0.1.3 — 2026-05-26 This update is a chemistry fix: the pH-lowering acid dose was under-shooting. The new calculation properly accounts for total alkalinity, cyanuric acid, borates, and water temperature, so the suggested dose is now close to what you actually need to add. Bug fixes: • Dose recommendation now appears as soon as you open a level. Previously, if you'd never picked a chemical for that level before, the picker would show one but no dose was computed until you switched chemicals and back. • Buttons on the level detail, recommendation, and onboarding screens are now readable in dark mode. Several were white text on neon green. New warnings: • A warning when your pH reading is at or above 8.0. That's the top of most test scales, so re-test pH after lowering it. • A warning when dry acid is selected on a salt-water-generator pool. Dry acid adds sulfates that can damage the SWG cell. Muriatic acid is the safer choice. Thanks for using PoolLog. ### 0.1.2 — 2026-04-23 This update is all about being honest that PoolLog is for spas and hot tubs as much as pools. Every "Add Pool" affordance is now "Add Pool / Spa", and we've redone the App Store listing and our website to reflect that. Bug fixes: • Water temperature now displays correctly in Fahrenheit on US devices — previously the Celsius value was being shown with a °F label. • Water temperature no longer flags as "outdated" on the Status screen — it's informational, not a level you need to retest. • Fixed a crash on the Status screen when CYA was below 30 ppm. • Fixed a crash when attaching weather data to a test result via Siri or Shortcuts. Polish: • Chemical additions in pounds and ounces now show as "1 lb 4 oz" instead of "1.25 lb". • Dosage recommendations round more sensibly at small fractions. • Improved spacing and layout on the Status level-detail popover. • Chemical addition history preserves the units you actually entered, instead of normalizing them. Thanks for using PoolLog. ### 0.1.1 — 2026-04-14 Fixed some bugs around the calculations for liquids. ## More apps by Michael Holloway - [Scallion Browser](https://appshunter.io/ios/app/scallion-browser/id877302829) - [Jigsaw Puzzles: No Ads](https://appshunter.io/ios/app/jigsaw-puzzles-no-ads/id6762405588) - [Hearts: No Ads](https://appshunter.io/ios/app/hearts-no-ads/id6764618302) - [Word Search: No Ads](https://appshunter.io/ios/app/word-search-no-ads/id6769814765) - [Spades: No Ads](https://appshunter.io/ios/app/spades-no-ads/id6776399198) All apps by Michael Holloway: https://appshunter.io/developer/877302832 --- *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 2026-08-19.*