Best Langelier Saturation Index Apps

22+ iOS apps curated and reviewed

3.7 avg rating
18 free apps
Updated May 2026

Saturation Index Calculator is the household name in langelier saturation index, but it's far from the only option. We track 22+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Langelier Saturation Index

LSI Calc DB Water Balance Log#2

LSI Calc DB Water Balance Log by Verosocial Studio

LSI Job Logbook
Strong Contender
💼 Business
1.0(1 ratings)
FreeIn-App Purchases
LSI Calc DB Water Balance Log screenshot 1
LSI Calc DB Water Balance Log 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.

RIDS calc#3

RIDS calc by Wayne Henderson

Refractive Index Dry Substance
Worth Considering
🔍 Reference
5.0(1 ratings)
Free
RIDS calc screenshot 1
RIDS calc screenshot 2
RIDS calc screenshot 3
RIDS calc screenshot 4
RIDS calc screenshot 5
RIDS calc screenshot 6

This app accurately calculates properties for air, water, seawater, and sugars. It uses detailed, published formulations for precise results across various conditions, including solids level and density of corn syrup.

More Langelier Saturation Index apps to explore

4
Steam
Steam
Steam
Steam properties calculator
$4.99
$9.99 | 50% OFF
🔧 Utilities
(14)
5
Bunker One - Fuel Calculator
Bunker One - Fuel Calculator
Bunker One - Fuel Calculator
by Askapps
Free

This app provides a suite of calculators for marine fuel standards, including CCAI, Cetan Index, and blending calculations. It supports ISO 8217 and ASTM standards, with all inputs and outputs in SI units. Users can also access news and updates from the developer.

ISO 8217 fuel standard lookupCCAI Number calculationCetan Index calculation (old & new methods)
💼 Business
(2)
free
6
NPC Pro
NPC Pro
NPC Pro
by National Plasters Council, Inc
Free
$4.99 | 100% OFF

This app helps pool professionals manage water chemistry and follow startup procedures for plaster finishes. It offers an LSI calculator, water chemistry recommendations, and step-by-step guides for maintaining pool surfaces. Connect with experts and access resources to ensure balanced water and durable finishes.

LSI Calculator for water balanceWater chemistry recommendationsPlaster startup procedures guide
💼 Business
(0)
free
7
IOR - Index of Refraction
IOR - Index of Refraction
IOR - Index of Refraction
by Studio Orb, LLC
$0.99

This reference app provides precise Index of Refraction values for over 250 materials, aiding 3D artists, engineers, and students. It features an interactive visualizer to demonstrate optical principles and a searchable library of scientific data.

250+ searchable materialsInteractive optical visualizerSnell's Law, Fresnel Reflectance, Brewster's Angle, TIR, Dispersion
🔍 Reference
(177)
paid
8
Haverly's PetroCalc
Haverly's PetroCalc
Haverly's PetroCalc
Oil & Gas Property Tools
Free

This application provides engineers, technicians, and students with a comprehensive set of tools for petroleum property calculations. It offers features for unit conversion, crude oil blending, viscosity prediction, and distillation curve analysis, all accessible offline.

Unit conversion for energy, temperature, pressure, and viscosityDistillation curve analysis and interpolationCrude oil and petroleum blending calculations
🔧 Utilities
(3)
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
SI Calculator Pro
SI Calculator Pro
SI Calculator Pro
LSI / RSI Calculator
Free
🔧 Utilities
(0)
11
SHIMADZU UV
SHIMADZU UV
SHIMADZU UV
by Shimadzu Business Systems Corporation
Free

This tool helps users of UV-Vis Spectrophotometers quickly check solvent characteristics and perform unit conversions. It provides details like usable wavelength limits, melting, and boiling points for various solvents, along with converters for common lab units.

Solvent characteristics lookupUsable wavelength limitsMelting and boiling point data
🔧 Utilities
(1)
free
12
DC Values
DC Values
DC Values
by Endress and Hauser Instruments International AG
Free
💼 Business
(0)
13
Neutrons4Science
Neutrons4Science
Neutrons4Science
by Institut Laue-Langevin
Free

Explore the fascinating world of neutrons and their applications in condensed matter physics and fundamental science. This app offers interactive 3D animations to visualize neutron spectroscopy experiments and understand complex scientific concepts.

Interactive 3D animationsNeutron spectroscopy visualizationCondensed matter physics exploration
📚 Education
(1)
free
14
Rheonics SensorView
Rheonics SensorView
Rheonics SensorView
Monitor Rheonics Sensors BLE
Free

Monitor Rheonics inline viscometers and density meters wirelessly via Bluetooth LE. View real-time measurements like viscosity, density, and temperature, with options to customize graphs. Future updates will include estimated parameters.

Wireless Bluetooth LE connectivityReal-time viscosity measurementReal-time density measurement
📊 Productivity
(2)
free
15
Pool Calculator & Chemistry
Pool Calculator & Chemistry
Pool Calculator & Chemistry
Water Balance Test & Dosage
Free
💼 Business
(1)
16
Standard Deviation Calculate
Standard Deviation Calculate
Standard Deviation Calculate
Statistics average calculator
Free

This utility calculates the standard deviation of a dataset, a key statistical measure of data dispersion. It helps understand how spread out values are from the average, with applications in science, industry, and finance.

Calculate standard deviationMeasure data dispersionUnderstand variation from mean
🔧 Utilities
(3)
free
17
Colorimetric Titration
Colorimetric Titration
Colorimetric Titration
Performs a colour analysis.
Free
🔧 Utilities
(0)
18
Water-Content
Water-Content
Water-Content
Water Content & Hydrates
Free
$6.99 | 100% OFF
📊 Productivity
(0)
19
Ekofluid Esca
Ekofluid Esca
Ekofluid Esca
Water Content Recalculation
Free
🔧 Utilities
(0)
20
Stochastic Processes
Stochastic Processes
Stochastic Processes
by Ilona Kosinska
Free
📚 Education
(0)