# VisionC (ETDRS Visual Acuity) vs ZRefractive

The clearest difference is price: ZRefractive at Free against VisionC (ETDRS Visual Acuity)'s $79.99. ZRefractive also leads on device support (3 vs 1). VisionC (ETDRS Visual Acuity)'s advantage is iOS requirement (10.0 vs 14.0). On update cadence, ads and in-app purchases there is nothing between them.

ZRefractive is free to download; VisionC (ETDRS Visual Acuity) costs $79.99 up front. Neither carries in-app purchases, so what you see is what you pay.

VisionC (ETDRS Visual Acuity) ships an update every 8 months, ZRefractive every 10 months. The most recent releases landed on September 7, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | VisionC (ETDRS Visual Acuity) | ZRefractive |
| --- | --- | --- |
| Price | $79.99 | **Free** |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/zrefractive/id1391502868/reviews)** |
| Number of ratings | — | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | — | Free |
| Size | 9 MB | 114 MB |
| Requires iOS | **10.0** | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Qvision, Departamento de Oftalmología](https://appshunter.io/developer/1602553646) | [bigtincan mobile pty ltd](https://appshunter.io/developer/1057042058) |

## What reviewers say

### VisionC (ETDRS Visual Acuity)

[App page](https://appshunter.io/ios/app/visionc-etdrs-visual-acuity/id1041393885)

**In-app purchases:** none


### ZRefractive

[App page](https://appshunter.io/ios/app/zrefractive/id1391502868)

This app provides educational and marketing content related to ZEISS refractive procedures for customers. Healthcare professionals can use it to inform patients directly from digital devices, share content, and connect with their practice development team.

**Highlights:** ZEISS refractive content access, Patient education tools, Digital content sharing, Email content option, Contact practice development team

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VisionC (ETDRS Visual Acuity) free?

VisionC (ETDRS Visual Acuity) costs $79.99, with no in-app purchases.

### Is ZRefractive free?

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

### Do VisionC (ETDRS Visual Acuity) or ZRefractive have ads?

Neither VisionC (ETDRS Visual Acuity) nor ZRefractive shows ads.

### Which is updated more often, VisionC (ETDRS Visual Acuity) or ZRefractive?

VisionC (ETDRS Visual Acuity) ships an update every 8 months, and ZRefractive every 10 months. Most recently, VisionC (ETDRS Visual Acuity) was updated on September 7, 2026 and ZRefractive on June 10, 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.*