# Multifocal Lens Analyzer vs CAS_Calc

The clearest difference is in-app purchases: CAS_Calc at none against Multifocal Lens Analyzer's 1. CAS_Calc also leads on update cadence (fortnightly vs every 2 months). Multifocal Lens Analyzer's advantage is iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Multifocal Lens Analyzer sells 1 in-app purchase, starting at $45.99 per year. CAS_Calc asks for nothing beyond the download.

Multifocal Lens Analyzer ships an update every 2 months, CAS_Calc fortnightly. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Multifocal Lens Analyzer | CAS_Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/multifocal-lens-analyzer/id1076177667/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 5 MB | 16 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qvision, Departamento de Oftalmología](https://appshunter.io/developer/1602553646) | [Peter Hoffmann](https://appshunter.io/developer/6797644932) |

## What reviewers say

### Multifocal Lens Analyzer

[App page](https://appshunter.io/ios/app/multifocal-lens-analyzer/id1076177667)

This application assists vision science professionals in measuring visual acuity defocus curves for multifocal lenses. It offers basic features for free and advanced functionalities through a pro subscription, enhancing clinical practice and research.

**Highlights:** Visual Acuity Defocus Curves, Defocus Lens Range Selection, Snellen Optotypes, Contrast Sensitivity Defocus Curve, Historical Database Storage, Data Export to .CSV

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $45.99 | per year |


### CAS_Calc

[App page](https://appshunter.io/ios/app/cas-calc/id6798420368)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Multifocal Lens Analyzer free?

Multifocal Lens Analyzer is free to download, with in-app purchases available.

### Is CAS_Calc free?

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

### Do Multifocal Lens Analyzer or CAS_Calc have ads?

Neither Multifocal Lens Analyzer nor CAS_Calc shows ads.

### Which is updated more often, Multifocal Lens Analyzer or CAS_Calc?

Multifocal Lens Analyzer ships an update every 2 months, and CAS_Calc fortnightly. Most recently, Multifocal Lens Analyzer was updated on October 25, 2026 and CAS_Calc on October 17, 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.*