The Langelier Saturation Index computes the Langelier Saturation Index, a calculated number, to predict the calcium carbonate stability of water to determine equilibrium. This helps you determine the scaling potential of the water. A negative LSI indicates that the water is corrosive to steel.

The app also features a short interpretation of the the LSI value, and water temperature can be entered as Fahrenheit or Celsius.

This app features:

• Send your calculations or conversions by email
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs
• Latest version of iOS is supported
• iPhone 6, 6+, 5 screens and the original 3.5 inch screen are supported
• Export to CSV

No network connectivity required.

What’s New

Version 7.0

Sync using iCloud
Bug Fixes

Ratings and Reviews

Brasshandle ,

Handy for work and testing

Good to have available for record keeping...

New database functionality is very nice, especially with the auto save.

Exporting to spreadsheets format is very helpful.

Sync works great over iCloud

Celluloid Hero ,

Best app for LSI

Would like to see a history of values and graph trends with a place for comments about what actions were taken to change LSI.

Livewire21 ,

Great app

Does what it says. I use it daily. Better than working it out on paper!


Verosocial Studio
2.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Copyright 2017 Verosocial Studio


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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