Best Swimming Pool Calculator Apps

250+ iOS apps curated and reviewed

4.3 avg rating
19 free apps
Updated September 2026

Pool Math Calculator is the household name in swimming pool calculator, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Swimming Pool Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Pool Math CalculatorPool Math CalculatorFree4.8★ (43)NoYesAug 2026
2OrendaOrendaFree4.7★ (476)NoNoSep 2026
3Clorox PoolClorox PoolFree4.6★ (29K)YesNoSep 2026
4Pool Chem CalculatorPool Chem CalculatorFree4.3★ (36)YesYesSep 2026
5Leslie's - Pool CareLeslie's - Pool CareFree4.6★ (14K)NoNoSep 2026
6Pentair PoolPentair PoolFree4.6★ (23K)NoNoSep 2026
7Pool Calculator & ChemistryPool Calculator & ChemistryFree4.0★ (1)NoYesJul 2026
8Pool Math by TroubleFreePoolPool Math by TroubleFreePoolFree3.7★ (272)NoYesSep 2026

Top Picks for Swimming Pool Calculator

Pool Math Calculator#1

Pool Math Calculator by Sergii Nesterenko

Chlorine & water chemistry
Editor's Choice
🌟 Lifestyle
4.8(43 ratings)
FreeIn-App Purchases
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This app simplifies pool water chemistry by calculating precise chemical dosages for balanced water. It helps estimate the impact of adding various chemicals and determines pool volume from basic measurements. Designed for practical, everyday pool maintenance, it keeps essential information readily accessible.

Orenda#2

Orenda by Hasa Inc.

Pool Calculator and Education
Strong Contender
📊 Productivity
4.7😊(476 ratings)
Free
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This app helps you master pool chemistry by accurately calculating chemical dosages and balancing water based on the LSI. It offers a user-friendly experience for both novices and professionals, including a volume estimator and educational videos.

What We Love

  • 🚀 Easy to use
  • 💡 Helpful for pool maintenance
  • 🚀 Simplifies pool chemistry
  • 👍 Provides valuable information
  • 👍 Great educational resources
  • 👍 Useful app for pool professionals

Room to Improve

  • 🐛 Issues with updating desired levels
  • 🐛 Metric system not working properly
  • 🐛 Difficult to input readings
  • 🐛 Lack of history/logging functionality
Clorox Pool#3

Clorox Pool by BioLab, Inc.

Simple, smart pool maintenance
Worth Considering
🌟 Lifestyle
4.6😞(29K ratings)
FreeAds
Clorox Pool screenshot 1
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This app helps DIY pool owners maintain their pools with expert water test analysis and personalized product recommendations. It offers troubleshooting for common pool problems and allows users to shop for recommended products online.

What We Love

  • 🚀 Easy to use
  • 👍 Helpful for pool maintenance
  • 💡 Provides chemical recommendations
  • 🚀 Scanning test strips is convenient

Room to Improve

  • 🐛 Inaccurate test results
  • 🔒 Requires account creation
  • 🐛 Frequent login issues
  • 🐛 Inconsistent app performance
  • 💰 Pushes Clorox products

More Swimming Pool Calculator apps to explore

FAQ about Swimming Pool Calculator

What are the best swimming pool calculator apps for iPhone?
Pool Math Calculator tops our swimming pool calculator apps ranking as of September 2026, with a 4.8-star average from 43 App Store ratings, and it's free to download.
Yes — 19 of the top swimming pool calculator apps we rank are free to download, including Pool Math Calculator and Orenda.
Pool Math Calculator has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ swimming pool calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Pool Math Calculator helps you accurately calculate chemical dosages for your pool water, check water balance targets, estimate the effect of adding chemicals, and calculate your pool's volume. It aims to remove guesswork from daily pool care.
Pool Math Calculator can calculate dosing for free chlorine, pH, alkalinity, calcium hardness, stabilizer, borates, and salt. It also estimates the effect of adding common pool chemicals like bleach, acid, borax, washing soda, and salt.