# ZEISS MICOR vs IOL Reference

The clearest difference is update cadence: IOL Reference at weekly against ZEISS MICOR's every 21 months. IOL Reference also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ZEISS MICOR ships an update every 21 months, IOL Reference weekly. The most recent releases landed on April 21, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | ZEISS MICOR | IOL Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (15 ratings)](https://appshunter.io/ios/app/iol-reference/id1626671895/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | — | 88.9% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 21 months | **Weekly** |
| Monetization | — | Free |
| Size | 27 MB | 823 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [Gurpal Virdi](https://appshunter.io/developer/1626671897) |

## What reviewers say

### ZEISS MICOR

[App page](https://appshunter.io/ios/app/zeiss-micor/id1567015045)

**In-app purchases:** none


### IOL Reference

[App page](https://appshunter.io/ios/app/iol-reference/id1626671895)

This ophthalmology utility helps surgeons find FDA-approved intraocular lenses. It features a searchable database of nearly 10,000 lenses, updated with new approvals and changes. The app also serves as a social media and networking platform for eye care professionals.

**Highlights:** Searchable IOL database, FDA-approved lens catalog, Database updates, Ophthalmology networking, Eye care tools

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

**In-app purchases:** none


## Frequently asked questions

### Is ZEISS MICOR free?

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

### Is IOL Reference free?

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

### Which is updated more often, ZEISS MICOR or IOL Reference?

ZEISS MICOR ships an update every 21 months, and IOL Reference weekly. Most recently, ZEISS MICOR was updated on April 21, 2026 and IOL Reference on July 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.*