# Saturation Index Calculator

> Pool water chemistry balance calculator based on Langelier Saturation Index. (iPhone/iPad app by Affektive Software LLC.)

- Source: https://appshunter.io/ios/app/saturation-index-calculator/id1219659536 (this page in markdown: same URL + `.md`)
- Developer: [Affektive Software LLC](https://appshunter.io/developer/1219659535)
- Category: Productivity, Utilities
- Price: Free
- Rating: 4.30/5 from 4 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.2 · 13 MB
- Languages: American English
- Released: 2017-03-27
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/saturation-index-calculator/id1219659536/reviews.md

## What is Saturation Index Calculator?

Calculate your pool's Langelier Saturation Index (SI) using this simple and user-friendly app. The Saturation Index will help you determine whether or not your pool chemistry is balanced, the first step in troubleshooting problems such as cloudy water, etc. All you have to do is input your pool's pH, water temperature, total alkalinity, calcium hardness, and total dissolved solids (TDS less than 1000 or greater than or equal to 1000) and we will tell you how balanced your water is along with a recommendation of the effects this may have on your pool equipment.

## Key features

- Langelier Saturation Index calculation
- pH input
- Water temperature input
- Total alkalinity input
- Calcium hardness input
- Total dissolved solids input
- Equipment effect recommendation

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/saturation-index-calculator/id1219659536/reviews.md

### 1/5 — Useless as cannot input actual TDS

*2022-10-12*

TDS cannot be entered as a value.  Input is limited to under 1000 or over 1000 ppm.  So throw away your TDS meter.  

Other inputs are also inexact, using a scale bar.  Very rounded.  What is the point of having an accurate water test when you can’t even input the values.  

Useless app!

### 2/5 — Which saturation index?

*2021-05-08*

Price is right, but without comparisons to other calculators it isn’t clear which saturation index this provides.  LSI and CSI are two common indexes used in pool treatment.

## Frequently asked questions about Saturation Index Calculator

### What is the Langelier Saturation Index Calculator used for?

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.

### What information do I need to input into the Saturation Index Calculator?

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.

### Is the Saturation Index Calculator available on Android devices?

Based on the provided data, the Saturation Index Calculator is currently supported on iPhone and iPod devices. There is no mention of Android compatibility.

### How often is the Saturation Index Calculator updated?

The app's latest version is 1.0, and it was last updated on March 27, 2017. This indicates infrequent updates since its release.

### What is the age rating for the Saturation Index Calculator?

The Saturation Index Calculator has an age rating of 4+. This means it is considered suitable for children aged 4 and above.

### Does the Saturation Index Calculator have ads?

No, the Saturation Index Calculator does not contain advertisements. The 'hasAds' flag is set to false.

### What is the user sentiment for the Saturation Index Calculator?

The app has a rating of 4.3 stars from 4 ratings. This suggests generally positive user feedback, though the small number of ratings limits broad conclusions.

### Can I use the Saturation Index Calculator offline?

The provided description does not specify offline functionality. However, as it is a calculation-based app requiring user input, it is likely to function without an internet connection.

## Version history (last 1 release)

### 1.0 — 2017-03-27

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by Affektive Software LLC

- [DigiQuatics](https://appshunter.io/ios/app/digiquatics/id6478390465)

All apps by Affektive Software LLC: https://appshunter.io/developer/1219659535

## Related topics

[saturation index calculator](https://appshunter.io/ios/topics/saturation-index-calculator) · [langelier saturation index](https://appshunter.io/ios/topics/langelier-saturation-index) · [affektive software llc](https://appshunter.io/ios/topics/affektive-software-llc) · [satur](https://appshunter.io/ios/topics/satur) · [saturation pool](https://appshunter.io/ios/topics/saturation-pool) · [saturation](https://appshunter.io/ios/topics/saturation)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*