Comparison

Pool Log vs PoolChem Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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/

About

PoolChem Tracker

This app provides precise pool chemical dosing recommendations based on your test results and pool size. It calculates a health score for your water and offers a prioritized action list to maintain balance. Works offline with no account required.

Highlights
  • Precise dosing recommendations
  • Pool Health Score (0-100)
  • Prioritized action list
  • CYA-adjusted chlorine targets
  • LSI calculator
  • Chemical inventory tracking
  • Offline functionality
Features
Read full description

Stop guessing. Start knowing. Enter your water test results and get exact dosing recommendations for your pool size: what to add, how much, and in what order. A simple Pool Health Score (0-100) shows you where your water stands at a glance. No account. No ads. No internet required. Your data stays on your device. Works with chlorine pools, saltwater (SWG) pools, and all pool types. Imperial and Metric units supported. Free: includes 5 complete water test logs • Precise chemical doses calculated for your pool size • Pool Health Score with prioritized treatment steps to avoid overcorrecting • CYA-adjusted chlorine targets • Log FC, TC, pH, Total Alkalinity, Calcium Hardness, CYA, Salt, Iron, Copper, and Phosphates • Full LSI (Langelier Saturation Index) calculator • Smart validation to catch typos before saving • Equipment maintenance tracker with reminders for skimmer, pump basket, filter, and SWG cell • Chemical inventory tracking • Built-in reference guide with recommended ranges • Automatic light and dark mode Pro: one-time purchase, no subscription • Unlimited water test history • Charts and long-term trend tracking • Detailed Health Score breakdown with per-parameter analysis • Trend detection with actionable insights • Six climate zone presets for more accurate water balance targets • Borate tracking (30-50 ppm target range) • Maintenance history and custom maintenance schedules • Advanced reminders with custom intervals • Liquid chlorine and muriatic acid concentration settings • Advanced LSI factor breakdown with a "What If?" simulator • CSV export and import Built by a pool owner who wanted accurate, straightforward chemistry guidance without the guesswork or the subscription fee.

Screenshots

Pool Log4 screens
PoolChem Tracker4 screens

Verdict

The call

The clearest difference is monetization model: Pool Log at free against PoolChem Tracker's freemium. Pool Log also leads on rating (4.7 vs 4.5). PoolChem Tracker's advantage is update cadence (every 5 days vs every 2 weeks). On price, ratings volume, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Pool Log sells 2 in-app purchases, starting at $0.99 per month and PoolChem Tracker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Pool Log holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 6 and 6 respectively.

UpkeepUpdate frequency

Pool Log ships an update every 2 weeks, PoolChem Tracker every 5 days. The most recent releases landed on September 30, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Pool Log versus PoolChem Tracker: the parameters behind the verdict, then further details
ParameterPool LogPoolChem Tracker
PriceFreeFree
Rating4.7 (6 ratings) — better4.5 (6 ratings)
Positive reviews—100.0% of reviews
Number of ratings66
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS26.0 — better26.4
Further details — not scored
Size11 MB12 MB
Age rating4+4+
DeveloperMichael HollowayJeffrey Thompson

Customer experience

Pool Log

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%

PoolChem Tracker

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Pool Log

Subscriptions2
  • Monthly Plan7 Days trial$0.991 Month
  • Annual Plan7 Days trial$7.991 Year
1 purchases

PoolChem Tracker

One-time1
  • PoolChem Pro$4.99

Questions

Is Pool Log free?
Pool Log is free to download, with in-app purchases available.
Is PoolChem Tracker free?
PoolChem Tracker is free to download, with in-app purchases available.
Which has better reviews, Pool Log or PoolChem Tracker?
Pool Log is rated higher. Pool Log averages 4.7 out of 5 from 6 ratings, while PoolChem Tracker averages 4.5 from 6 ratings.
Do Pool Log or PoolChem Tracker have ads?
Neither Pool Log nor PoolChem Tracker shows ads.
Which is updated more often, Pool Log or PoolChem Tracker?
Pool Log ships an update every 2 weeks, and PoolChem Tracker every 5 days. Most recently, Pool Log was updated on September 30, 2026 and PoolChem Tracker on October 3, 2026.

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