PoolWater vs Pool Log
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PoolWater
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Dive into the Future of Pool Maintenance with PoolWater-Pro! Say goodbye to tedious and time-consuming water testing with our revolutionary app. No more hassles with collecting water samples, pool shop trips, bad advice, or unnecessary purchases. PoolWater-Pro offers accuracy and convenience, allowing for fast testing of your pool water from the comfort of your home. Simply snap a picture of your test strip, and the app converts the test strip colors into calibrated digital readings in seconds. Temperature-adjusted results guarantee perfect chemical balance every time. With just a few clicks, you'll be on your way to crystal-clear water. Select pool test options, press the confirm button, and let our app do the rest. No more guesswork—only instant and precise results! Take control of your pool's setup, water test history, and chemical costs with ease. Our intuitive interface guides you through every part of the process, offering helpful tips and suggestions to keep you on top of your pool game. Key Features: * Test for pH, Free Available Chlorine, Alkalinity, and Cyanuric Acid: Ensure perfect water balance with comprehensive chemical testing. * Personalized Notifications: Get reminders and tips to make pool care easy. * Accurate and Fast Results: Temperature-adjusted readings for precision. * User-Friendly Interface: Intuitive design for seamless navigation. * Water Test History: Keep track of your pool's water quality over time. * Cost Management: Monitor and manage chemical expenses effectively. Order PoolWater-Pro now and elevate your pool maintenance routine to effortless!
Pool Log
This app provides precise chemical dosing instructions for pools and spas based on your test results. It tracks multiple water bodies, integrates local weather data, and offers advanced features like SLAM mode for algae and CSI calculations. All data is stored locally for privacy.
- 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
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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/
Screenshots
Verdict
The clearest difference is in-app purchases: PoolWater at none against Pool Log's 2. PoolWater also leads on iOS requirement (12.4 vs 26.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Pool Log sells 2 in-app purchases, starting at $0.99 per month. PoolWater asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.
| Parameter | PoolWater | Pool Log |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (6 ratings) — better |
| Number of ratings | — | 6 — better |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 12.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 23 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Terence Newton | Michael Holloway |
In-app purchases
PoolWater
No in-app purchases
Pool Log
- Monthly Plan7 Days trial$0.991 Month
- Annual Plan7 Days trial$7.991 Year









