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Best Lsi Calculator Apps

250+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated September 2026

Whether you're new to lsi calculator or looking for an upgrade, our curated collection of 250+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Lsi Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1OrendaOrendaFree4.7★ (473)NoNoSep 2026
2LSI CalculatorLSI CalculatorFree4.4★ (5)NoNoMay 2026
3LSI Water Service Logbook/PlanLSI Water Service Logbook/PlanFree was $0.99—NoYesSep 2026
4Pool Math by TroubleFreePoolPool Math by TroubleFreePoolFree3.7★ (272)NoYesAug 2026
5Calculator ∞Calculator ∞$5.994.7★ (6.3K)NoYesSep 2026
6Calculator - Editable HistoryCalculator - Editable HistoryFree—YesNoAug 2026
7Calculator- scientificCalculator- scientificFree—YesNoMay 2026
8FusionCalc - Calculator AppFusionCalc - Calculator AppFree was $2.49—YesYesMay 2026

Top Picks for Lsi Calculator

Orenda#1

Orenda by Hasa Inc.

Pool Calculator and Education
Editor's Choice
📊 Productivity
4.7😊(473 ratings)
Free
Orenda screenshot 1
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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
LSI Calculator#2

LSI Calculator by Pure Planet Science & Technology, Inc.

Commercial Pool Calculator
Strong Contender
📊 Productivity
4.4(5 ratings)
Free
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This app provides tools and educational resources to help users manage water systems, focusing on eco-friendly treatments for pools and spas. It aims to make water maintenance accessible to everyone, regardless of their experience level.

LSI Water Service Logbook/Plan#3

LSI Water Service Logbook/Plan by Verosocial Studio

Pool & Spa Balance Planner
Worth Considering
🔧 Utilities
0.0(0 ratings)
FreeIn-App Purchases
LSI Water Service Logbook/Plan screenshot 1
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Easily calculate and track the Langelier Saturation Index for your pool water. Maintain optimal water balance for a healthy and safe swimming environment. Supports multiple units and saves your calculations over time.

More Lsi Calculator apps to explore

FAQ about Lsi Calculator

What are the best lsi calculator apps for iPhone?
Orenda tops our lsi calculator apps ranking as of September 2026, with a 4.7-star average from 473 App Store ratings, and it's free to download.
Yes — 19 of the top lsi calculator apps we rank are free to download, including Orenda and LSI Calculator.
Orenda has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ lsi calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The Orenda app is a swimming pool calculator designed to help users master pool chemistry. It accurately calculates chemical dosages and balances water according to the LSI, making pool chemistry easier for both novices and professionals.
Key features include a chemical dosing calculator, LSI water balancing, a pool volume estimator, a user-friendly interface, and access to educational videos within the app.