LSI Water Service Logbook/Plan

LSI Water Service Logbook/Plan

Pool & Spa Balance Planner

0 ratings
10 reviews
$0.99 Free
In-App Purchases

Price history


Details

  • Released
  • Updated
  • May 27, 2010
  • July 17, 2026

Features

LSI Water Service Logbook/Plan screenshot #1 for iPhone
LSI Water Service Logbook/Plan screenshot #2 for iPhone
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About

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.

LSI Calculation
Water Chemistry Tracking
Email Calculations
CSV Export
Offline Use
Universal App Support
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What's New in LSI Water Service Logbook/Plan

9.3

July 17, 2026

You keep the water work moving, and good records make that work easier to trust later. Thank you for using LSI Water Service Log and for putting it to work on real pool and spa service days. This update focuses on a cleaner app flow, stronger Pro access handling, better settings, clearer help, and a More screen that keeps important tools easier to reach. Navigation is now simpler: - Quick Calc now has its own fourth tab for faster access. - Spreadsheet review moved into More where it fits with the rest of the review tools. - More now brings Pro, Spreadsheet, Import and Export, Settings, Help, and About together. - The More screen has a cleaner pool-style look with simple rows and clear labels. - Settings and About are now easy to find from More. Pro access is clearer and easier to act on: - The Pro screen is more compact at the top. - Purchase options are available directly from the Pro view. - Restore purchase access remains available. - Locked features now guide users to the correct Pro screen. - Pro status copy is easier to understand. - Purchase messages use clearer App Store wording. Purchase access is also more dependable: - The app now checks current App Store purchase status when it launches. - Local cached purchase state is treated only as a temporary helper. - Cached purchase access is cleared when verification is not available. - Unverified purchase information no longer keeps features unlocked. - Pro access updates more directly after purchase, restore, or entitlement changes. Settings gained useful everyday controls: - Added an Appearance setting. - Choose Follow System to use the device appearance. - Choose Light when you prefer a bright app look. - Choose Dark when you prefer a darker app look. - Keep default units for new records and Quick Calc. - Clear recent calculator inputs without affecting saved records. - Check the installed app version from Settings. - Use the new manual Check for Updates button. - Open the App Store from the update result when a newer version is available. About and Help are more user-friendly: - About now includes clear AS IS and no warranty language. - Help text now focuses on what users do in the app. - Cleaned up wording so screens read more naturally. - Calculator notes explain the result in plain language. - Import and export wording now talks about backups and spreadsheet files. - Quick Calc copy now explains local use without technical storage details. - Support, privacy, and terms links remain grouped in Settings and About. Import, export, and sharing text is cleaner: - Export Spreadsheet File now uses clearer wording. - Records Backup and Full Backup labels are easier to understand. - Import Backup now matches the backup language used elsewhere. - Export status messages are easier to read. - Import success messages now refer to saved items from backup. - Backup error messages are less technical. Record and calculator wording also got polish: - The help flow now starts with Add Site, Records, and More. - Record editing instructions are clearer. - Quick Calculator guidance now matches the current actions menu. - Formula help keeps the useful calculation details without extra clutter. - Local calculation text now feels more natural. This version also tightens the finished app experience across the screens users see most. The result is a cleaner app for pool and spa water balance tracking, faster everyday navigation, more reliable Pro access, clearer settings, and better wording throughout. Thanks again for using LSI Water Service Log. This update is meant to make every reading, record, backup, and review step feel more direct while keeping the app focused on practical pool and spa service work.

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Subscription plans

LSI Calculators pro Monthly

Unlimited app usage with all features for 1 month

$1.991 Month
How to cancel LSI Water Service Logbook/Plan subscription ⁉️
2

In-App Purchases

$14.99

LSI Calculators pro lifetime

Unlimited app usage with all features

User reviews

One off fee payment removed

Paid the one off fee to use the app, accessed a few week, but has now stopped working and ‘restoring’ the purchase does not work either. So can no longer use.

Works great

Very pleased with the direction it’s going especially the spreadsheet view so I can look at a lot of records and data at the same time

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

Handy, but needs expansion to include sulfate

Not bad

Great app

Very useful app.

Developer apps

FAQ

What is the Langelier Saturation Index calculator?

The Langelier Saturation Index calculator is a tool that helps pool owners and professionals determine the balance of their pool water. It calculates the LSI based on pH, temperature, total alkalinity, and calcium hardness levels, ensuring a healthy swimming environment.

How accurate are the Langelier Saturation Index calculations?

The app provides instant and accurate calculations of the LSI. Users can track changes over time to make necessary adjustments to their pool's water chemistry.

Can I use the Langelier Saturation Index calculator offline?

Yes, the Langelier Saturation Index calculator does not require network connectivity, allowing you to perform calculations anywhere.

What devices support the Langelier Saturation Index calculator?

The Langelier Saturation Index calculator is a universal app that supports iPhone, iPod Touch, and iPad devices, ensuring compatibility across various screen sizes.

How often is the Langelier Saturation Index calculator updated?

The latest version of iOS is supported, and the app was last updated on July 6, 2023, indicating regular maintenance and updates.

What is the price of the Langelier Saturation Index calculator?

The Langelier Saturation Index calculator is available for a one-time purchase of $0.99.

Can I share my pool water calculations?

Yes, you can send your calculations or conversions by email directly from the app. Additionally, you can export your data to CSV format for further analysis.

What is the age rating for the Langelier Saturation Index calculator?

The Langelier Saturation Index calculator has an age rating of 4+, making it suitable for a wide range of users.