# VisuCaller vs LSI Calculator

The clearest difference is price: LSI Calculator at Free against VisuCaller's $1.99. LSI Calculator also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 15 months). On rating, ratings volume, ads and device support there is nothing between them.

LSI Calculator is free to download; VisuCaller costs $1.99 up front. VisuCaller sells 1 one-off in-app purchase. LSI Calculator asks for nothing beyond the download.

VisuCaller holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 12 and 5 respectively. Written reviews complicate that: 75% of VisuCaller's written reviews are positive against 100% of LSI Calculator's, so the app with the better star average is not the one people write more warmly about.

VisuCaller ships an update every 15 months, LSI Calculator every 2 months. The most recent releases landed on October 23, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | VisuCaller | LSI Calculator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/visucaller/id831046475/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/lsi-calculator/id1233049990/reviews) |
| Number of ratings | **12** | 5 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 7 MB | 52 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [iRead Solutions Inc.](https://appshunter.io/developer/464511552) | [Pure Planet Science & Technology, Inc.](https://appshunter.io/developer/1234693265) |

## What reviewers say

### VisuCaller

[App page](https://appshunter.io/ios/app/visucaller/id831046475)

Easily scan and call printed phone numbers directly from your device. Enhance functionality with an in-app purchase to scan contact details from images or the viewfinder, saving them to your contacts or custom lists. Manage information efficiently for various needs.

**Highlights:** Scan printed phone numbers, Scan contact info from images, Scan contact info from viewfinder, Save scanned contacts, Create custom contact lists, Automatic calling for detected numbers, Zoom control for scanning

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contact Support | $1.99 | one-time |


### LSI Calculator

[App page](https://appshunter.io/ios/app/lsi-calculator/id1233049990)

This app provides tools and educational resources to help users manage water systems, focusing on eco-friendly treatments for pools and spas. It aims to make water maintenance accessible to everyone, regardless of their experience level.

**Highlights:** Water science education, Pool and spa water management, Eco-friendly treatment guidance, NSF/ANSI Certified product information, Tools for water system management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VisuCaller free?

VisuCaller costs $1.99, and also offers in-app purchases.

### Is LSI Calculator free?

LSI Calculator is free to download, with no in-app purchases.

### Which has better reviews, VisuCaller or LSI Calculator?

VisuCaller is rated higher. VisuCaller averages 4.6 out of 5 from 12 ratings, while LSI Calculator averages 4.4 from 5 ratings.

### Do VisuCaller or LSI Calculator have ads?

Neither VisuCaller nor LSI Calculator shows ads.

### Which is updated more often, VisuCaller or LSI Calculator?

VisuCaller ships an update every 15 months, and LSI Calculator every 2 months. Most recently, VisuCaller was updated on October 23, 2026 and LSI Calculator on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*