Best Saturation Index Calculator Apps

230+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our saturation index calculator list covers 230+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Compare top Saturation Index Calculator Apps (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Saturation Index CalculatorSaturation Index CalculatorFree4.3★ (4)NoNoMay 2026
2OrendaOrendaFree4.7★ (452)NoNoAug 2026
3LSI Water Service Logbook/PlanLSI Water Service Logbook/PlanFree was $0.99NoYesJul 2026
4Calculate by QxMDCalculate by QxMDFree4.8★ (5.1K)YesNoAug 2026
5Pool Math by TroubleFreePoolPool Math by TroubleFreePoolFree3.7★ (272)NoYesJul 2026
6Leslie's - Pool CareLeslie's - Pool CareFree4.6★ (14K)NoNoAug 2026
7PooliPooliFree4.6★ (366)NoNoJul 2026
8Calculator for iPad!Calculator for iPad!Free4.7★ (60K)NoNoAug 2026

Top Picks for Saturation Index Calculator

Orenda#2

Orenda by Hasa Inc.

Pool Calculator and Education
Strong Contender
📊 Productivity
4.7😊(452 ratings)
Free
Orenda screenshot 1
Orenda screenshot 2
Orenda screenshot 3
Orenda screenshot 4

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

Room to Improve

  • 🐛 Issues with updating desired levels
  • 🐛 Metric system not working properly
  • 🐛 Difficult to input readings
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
LSI Water Service Logbook/Plan screenshot 2

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 Saturation Index Calculator apps to explore

4
Calculate by QxMD
Calculate by QxMD
Calculate by QxMD
Medical Calculator
Free

This clinical calculator and decision support tool offers over 200 medical calculators and tools for diagnosis, treatment, and prognosis. It adapts to your practice and provides detailed references, integrating with PubMed and Read by QxMD.

Over 200 medical calculatorsClinical decision support toolsCardiology, internal medicine, and more
🏥 Medical
(5.1K)
free with in-app purchases
5
Pool Math by TroubleFreePool
Pool Math by TroubleFreePool
Pool Math by TroubleFreePool
Easy pool care and maintenance
Free

Easily manage your swimming pool's water chemistry by tracking key levels like chlorine and pH. This app calculates the precise amounts of chemicals needed to maintain clear, algae-free water, offering a cost-effective alternative to pool store advice.

Chemical level calculators (pH, Chlorine, Alkalinity, etc.)Track pool maintenance tasksLog chemical additions
🔧 Utilities
(272)
freemium
6
Leslie's - Pool Care
Leslie's - Pool Care
Leslie's - Pool Care
Pool maintenance made easy
Free

Manage your pool and spa maintenance with ease. Get personalized water treatment plans, track your water test history, and access exclusive member deals. Shop for supplies and find local stores effortlessly.

Personalized water treatment plansTrack pool water test historyExclusive member rewards and deals
🌟 Lifestyle
(14K)
free with in-app purchases
7
Pooli
Pooli
Pooli
Smart Pool & Spa Care
Free

This app helps you maintain a clean and safe pool or spa with smart testing, tailored advice, and customized task lists. It offers advanced AI for instant feedback, problem resolution guidance, and comprehensive sanitization support. Track multiple pools, manage inventory, and even collaborate with others for effortless pool care.

Smart water testing with manual entry or strip scanningInteractive Calcite Saturation Index (CSI) toolTailored reports and expert maintenance advice
🔧 Utilities
(366)
free with in-app purchases
8
Calculator for iPad!
Calculator for iPad!
Calculator for iPad!
Basic & Scientific Calculator
Free

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

Basic and scientific calculator modesOver 30 scientific operationsCustomizable appearance (iPad)
🔧 Utilities
(60K)
free
9
PoolCalc
PoolCalc
PoolCalc
by Bonham Customs
Free

This utility calculates the scaling potential of pool water using the Langelier Saturation Index. It allows users to save and edit readings, locations, and add notes. A paid upgrade offers advanced features for pool professionals.

Langelier Saturation Index calculationSave and edit readingsSave and edit locations
🔧 Utilities
(1)
free with in-app purchases
10
Peptide Calculator: PepCalc
Peptide Calculator: PepCalc
Peptide Calculator: PepCalc
Dosage & Reconstitution Tool
Free

This tool simplifies peptide dosage and reconstitution calculations. It accurately determines injection volumes and the correct amount of water for mixing, converting results to insulin syringe units. Designed for researchers and wellness enthusiasts, it ensures precise and confident peptide administration.

Accurate dosage calculationEasy reconstitution calculationInsulin syringe unit conversion
🏥 Medical
(378)
free
11
Gravel Calculator Plus
Gravel Calculator Plus
Gravel Calculator Plus
by Inch Calculator
Free

Easily estimate the quantity of various landscaping and hardscaping materials like gravel, stone, and sand. Get precise measurements in tons, cubic yards, or cubic meters for your projects.

Estimate gravel, stone, rock, sand, and topsoilCalculate material needed for landscapingCalculate material needed for hardscape projects
🔧 Utilities
(1.7K)
ad-supported
12
Pool Time ClearPool Expert™
Pool Time ClearPool Expert™
Pool Time ClearPool Expert™
by BioLab, Inc.
Free

This app provides expert water analysis for your swimming pool using test strips or kits. It offers personalized maintenance plans, reminders, and troubleshooting tips to keep your pool clean and swim-ready. You can also add recommended products to a shopping cart for purchase.

Expert water analysis with test strips or kitsPersonalized pool maintenance plansMaintenance reminders
🔧 Utilities
(5.3K)
free
13
BA Financial Calculator Plus
BA Financial Calculator Plus
BA Financial Calculator Plus
TVM, NPV, Loan, ROI Calculator
Free
$5.99 | 100% OFF

This app offers a comprehensive suite of financial calculators, including TVM, NPV, and ROI, with detailed explanations, formulas, and examples. It provides data visualization, reports, and AI-powered insights for complex financial calculations, all while prioritizing on-device processing for privacy.

Financial calculators with descriptions, formulas, and examplesTime Value of Money (TVM) calculationsNet Present Value (NPV) and Internal Rate of Return (IRR)
💰 Finance
(144)
free with in-app purchases
14
Peptide Calculator App
Peptide Calculator App
Peptide Calculator App
Pepcalc Compound & Dosage
Free

This app serves as a comprehensive peptide dosage calculator for researchers and enthusiasts. It offers features like saving calculations, tracking peptide usage, and a reconstitution guide. Users can also explore mixing ratios and export results to PDF.

Syringe size optionsSave and edit calculationsPeptide tracking and history
🏥 Medical
(538)
free with in-app purchases
15
SI Calculator Pro
SI Calculator Pro
SI Calculator Pro
LSI / RSI Calculator
Free
🔧 Utilities
(0)
16
CliniCalc Medical Calculator
CliniCalc Medical Calculator
CliniCalc Medical Calculator
Formulas, Scales & More
Free

This app provides medical professionals with a comprehensive collection of formulas, scores, and classifications. It offers quick access to essential medical calculations with detailed background information and high-quality images. Users can easily search, store favorites, and switch between US and SI units.

Hundreds of medical formulas, scores, and classificationsStore favorite and view recently used calculationsSearchable database with keywords
🏥 Medical
(1.1K)
free with in-app purchases
17
DailyCalcs - Science calculator to simplify everyday tasks in the lab
DailyCalcs - Science calculator to simplify everyday tasks in the lab
DailyCalcs - Science calculator to simplify everyday tasks in the lab
by Thermo Fisher Scientific
Free

This app provides a suite of science calculators designed to simplify laboratory tasks. It includes tools for molarity, dilutions, molecular weight, cell culture, unit conversions, and specific scientific calculations for cell culture and transfection experiments.

Specific Productivity CalculatorTransfection CalculatorMolarity Calculator
🔧 Utilities
(5)
free
18
Vetcalculators
Vetcalculators
Vetcalculators
The Veterinary Calculator
Free

This app provides veterinarians and staff with a comprehensive suite of calculators for drug dosages, medical measurements, and patient assessments. It also includes a wide range of veterinary references for quick access to essential information.

Drug dose calculatorsEmergency drug dosagesFluid therapy rates
🏥 Medical
(605)
subscription
19
Soil Calculator Plus
Soil Calculator Plus
Soil Calculator Plus
by Inch Calculator
Free

Easily estimate the volume of soil, topsoil, dirt, and landscaping materials needed for any project. Supports various area shapes and multiple measurement units, providing results in multiple volume and weight formats, including the number of bags.

Estimate soil volumeSupports rectangular and circular areasMultiple measurement units (inches, feet, yards, cm, meters)
🔧 Utilities
(668)
ad-supported
20
FlightReady E6B
FlightReady E6B
FlightReady E6B
E6B Flight Computer
$7.99

This aviation utility provides over 100 functions, conversions, and utilities for pilots. It offers accurate calculations for flight planning, performance, navigation, and aerodynamics, surpassing other E6B apps with its comprehensive and precise scientific formulas.

Over 100 aviation functionsAccurate scientific formulasFlight planning calculations
🗺️ Navigation
(1.1K)
paid

FAQ about Saturation Index Calculator

What are the best saturation index calculator apps for iPhone?
Saturation Index Calculator tops our saturation index calculator apps ranking as of May 2026, with a 4.3-star average from 4 App Store ratings, and it's free to download.
Yes — 19 of the top saturation index calculator apps we rank are free to download, including Saturation Index Calculator and Orenda.
Saturation Index Calculator has no ads and has no in-app purchases, according to its App Store listing as of May 2026.
We track 230+ saturation index calculator apps on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
The Langelier Saturation Index Calculator helps you determine if your pool's water chemistry is balanced. By inputting specific water parameters, it provides a recommendation on the potential effects on your pool equipment.
You need to input your pool's pH, water temperature, total alkalinity, calcium hardness, and total dissolved solids (TDS). The app handles TDS values less than 1000 or greater than or equal to 1000.