Comparison

Pool Log vs Pool Chemistry by Poolometer

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

Pool Chemistry by Poolometer

This app simplifies pool maintenance by logging water test results, calculating chemical dosages, and tracking historical trends. It provides a clear maintenance plan and can generate guest passes with house rules.

Highlights
  • Log water test readings
  • Calculate chemical dosages
  • Track water chemistry trends
  • Generate guest passes
  • Set maintenance reminders
  • Import/export pool records
Features
Read full description

Poolometer helps pool owners turn confusing water tests into a clear maintenance plan: log readings, calculate suggested doses, track trends, and share guest-ready pool rules. Use the test strips or liquid kit you already trust. Enter your latest results and Poolometer keeps the history organized, explains what needs attention, and helps you make the next pool-care decision without guessing. WHY POOL OWNERS USE POOLOMETER Fast water test logging Record free chlorine, pH, total alkalinity, calcium hardness, stabilizer/CYA, salt, temperature, notes, and other readings without rebuilding a spreadsheet. Suggested chemical dosing Use built-in calculators and guidance for everyday pool chemistry decisions, including chlorine, acid, alkalinity, calcium, stabilizer, salt, dilution, and water balance planning. Swim status See a clear status prompt based on the latest saved readings so your family and guests know whether the pool needs attention before swimming. Trends and history Review how your water changes over time. Spot patterns after rain, parties, refills, opening week, hot weather, or a new maintenance routine. Maintenance reminders Keep routine care from slipping. Track daily and weekly tasks, review what changed, and stay ahead of cloudy water, algae, scaling, and equipment stress. Pool Pass for guests Create private guest passes with house rules, swim status, QR check-in, expiration, visit limits, emergency details, and access information while keeping owner settings private. Imports, exports, and backups Bring in existing pool records from supported CSV, JSON, and backup files. Export your history when you want a copy for deeper review, service calls, or seasonal notes. Playbooks and reference tools Use practical guides, calculators, troubleshooting paths, and archived equipment manuals for pool chemistry, testing accuracy, seasonal care, buying decisions, and common problems. Built for real pool ownership Poolometer is for the owner who wants fewer guesses, better records, and a repeatable system for keeping water clear. Works on iPhone, iPad, and Mac with account-backed records and secure sync across sessions and devices. Important: Poolometer is an informational pool-care tool. Always verify test results, product labels, manufacturer instructions, local requirements, and site-specific safety conditions before adding chemicals, changing equipment, or allowing swimming.

Screenshots

Pool Log4 screens
Pool Chemistry by Poolometer4 screens

Verdict

The call

The clearest difference is in-app purchases: Pool Chemistry by Poolometer at none against Pool Log's 2. Pool Chemistry by Poolometer also leads on rating (5.0 vs 4.7) and update cadence (weekly vs every 2 weeks). Pool Log's advantage is ratings volume (6 vs 2). On price, ads, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Pool Log sells 2 in-app purchases, starting at $0.99 per month. Pool Chemistry by Poolometer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Pool Chemistry by Poolometer holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

UpkeepUpdate frequency

Pool Log ships an update every 2 weeks, Pool Chemistry by Poolometer weekly. The most recent releases landed on August 19, 2026 and September 16, 2026 respectively.

Scorecard5 real differences · 5 level
Pool Log versus Pool Chemistry by Poolometer: the parameters behind the verdict, then further details
ParameterPool LogPool Chemistry by Poolometer
PriceFreeFree
Rating4.7 (6 ratings)5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings6 — better2
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS26.014.0 — better
Further details — not scored
Size11 MB8 MB
Age rating4+4+
DeveloperMichael HollowayWabi Sabi Ware LLC

Customer experience

Pool Log

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

Pool Chemistry by Poolometer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 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
None

Pool Chemistry by Poolometer

No in-app purchases

Questions

Is Pool Log free?
Pool Log is free to download, with in-app purchases available.
Is Pool Chemistry by Poolometer free?
Pool Chemistry by Poolometer is free to download, with no in-app purchases.
Which has better reviews, Pool Log or Pool Chemistry by Poolometer?
Pool Chemistry by Poolometer is rated higher. Pool Log averages 4.7 out of 5 from 6 ratings, while Pool Chemistry by Poolometer averages 5.0 from 2 ratings.
Do Pool Log or Pool Chemistry by Poolometer have ads?
Neither Pool Log nor Pool Chemistry by Poolometer shows ads.
Which is updated more often, Pool Log or Pool Chemistry by Poolometer?
Pool Log ships an update every 2 weeks, and Pool Chemistry by Poolometer weekly. Most recently, Pool Log was updated on August 19, 2026 and Pool Chemistry by Poolometer on September 16, 2026.

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