# Optonet Vision Unit vs MacDx

The clearest difference is in-app purchases: Optonet Vision Unit at none against MacDx's 1. Optonet Vision Unit also leads on iOS requirement (13.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. MacDx sells 1 in-app purchase, starting at $99.99 per month. Optonet Vision Unit asks for nothing beyond the download.

## The numbers

| Metric | Optonet Vision Unit | MacDx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/macdx/id6446411129/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | — |
| Monetization | — | Free with in-app purchases |
| Size | 66 MB | 15 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optonet](https://appshunter.io/developer/475378775) | [AMA Optics](https://appshunter.io/developer/1194938583) |

## What reviewers say

### Optonet Vision Unit

[App page](https://appshunter.io/ios/app/optonet-vision-unit/id1456179504)

**Features:** macOS Compatibility

**In-app purchases:** none


### MacDx

[App page](https://appshunter.io/ios/app/macdx/id6446411129)

This app measures macular dark adaptation to help identify potential maculopathy. It offers three distinct tests that provide detailed statistical data to assist eye care professionals in diagnosis. Results are archived for future reference.

**Highlights:** Macular dark adaptation measurement, White Light Dark Adaptation test, Color Light Dark Adaptation test, Dark Adaptation Curve test, Archived test results, Statistical data analysis

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $99.99 | per month |


## Frequently asked questions

### Is Optonet Vision Unit free?

Optonet Vision Unit is free to download, with no in-app purchases.

### Is MacDx free?

MacDx is free to download, with in-app purchases available.

### Do Optonet Vision Unit or MacDx have ads?

Neither Optonet Vision Unit nor MacDx shows ads.

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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.*