LSI Calculator is a free utility for pool and industrial water operators to calculate the Langelier Saturation Index on iOS.
The App DNA
What makes this app unique?
It removes the cognitive and time cost of manual chemical math for water maintenance, serving as a support tool for the developer's treatment products.
For Pool and spa owners, as well as industrial and agricultural water system operators requiring chemical balance calculations.
What does it look like?
Key features
Calculates the Langelier Saturation Index to determine water balance in pools, spas, and industrial systems.
Provides educational content on managing water systems for various aptitude levels.
How much does it cost?
The app operates as a free utility tool to support the developer's primary business of selling water treatment products.
Velocity
Dormant developmentUX improvementsShow more...
LSI Calculator has been inactive for over 32 months, with the latest release occurring 998 days ago. There is no evidence of ongoing development, maintenance, or live operations. The project appears to be abandoned, as no new feature builds or patches have been deployed in the last three years.
Who built it?
Pure Planet Science & Technology
2 apps tracked · Productivity
Natural PoolUser Sentiment
What do users think recently?
The recent review mood reads thrilled. Users appreciate automated water chemistry calculations remove the manual effort required to maintain pool balance and educational videos and articles provide ongoing learning opportunities for users managing their own water chemistry.
How are ratings & reviews evolving?
What users say, by theme
- Automated water chemistry calculations remove the manual effort required to maintain pool balance
- Educational videos and articles provide ongoing learning opportunities for users managing their own water chemistry
1 of 1 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for LSI Calculator
How's the Productivity market?
LSI Calculator maintains a 4.4-star rating on the iOS platform. The lack of updates for 998 days indicates a static position in the productivity category.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for LSI Calculator
Where is it heading?
Development has stalled, with no updates in nearly three years, signaling that the tool is a legacy asset rather than a growth driver. The absence of feature expansion means the app will likely lose ground to rivals that offer automated sensor integration, which would render manual calculation tools obsolete for professional operators.
- The 998-day update gap indicates the app is in maintenance mode, which limits its ability to compete with modern, sensor-integrated water management tools.
The SWOT
- Automated Langelier Saturation Index calculation removes manual math errors for operators
- Educational content could be expanded into a paid certification track for professional water technicians
Next best moves
Audit the codebase for critical security vulnerabilities because the app has not been updated in 998 days → maintain platform compliance
The counter-intuitive read
The app's lack of updates is a strategic…
Read the full takeSince the last report: The app's outlook has shifted from stable to declining, as the developer has transitioned from a maintenance-focused posture to treating the tool as a legacy asset. This change reflects a loss of confidence in the app's ability to compete with modern, sensor-integrated water management solutions.
Bottom line
The lack of updates since 2023 suggests the app is in maintenance mode, which risks losing relevance as competitors integrate real-time sensor data into their water management workflows.
Unlock 1 critical friction, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is LSI Calculator free to use?
Does LSI Calculator work for industrial water systems?
Is LSI Calculator still being updated?
Sources
- [1] App Store, source
Report last updated