# Saturation Index Calculator — user reviews

> 2 indexed App Store user reviews of Saturation Index Calculator by Affektive Software LLC, rated 4.30/5 from 4 ratings.

- Source: https://appshunter.io/ios/app/saturation-index-calculator/id1219659536/reviews
- App overview in markdown: https://appshunter.io/ios/app/saturation-index-calculator/id1219659536.md
- Rating breakdown: 5★ 3 · 4★ 0 · 3★ 0 · 2★ 1 · 1★ 0

## Most critical reviews (2 lowest-rated)

### 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.

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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.*