# SignOver vs IOL Reference

The clearest difference is update cadence: IOL Reference at weekly against SignOver's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

SignOver ships an update every 2 weeks, IOL Reference weekly. The most recent releases landed on September 9, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | SignOver | 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 | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 17 MB | 823 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mash Darvish](https://appshunter.io/developer/1478115886) | [Gurpal Virdi](https://appshunter.io/developer/1626671897) |

## What reviewers say

### SignOver

[App page](https://appshunter.io/ios/app/signover/id1478115887)

**Features:** macOS Compatibility

**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 SignOver free?

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

### Is IOL Reference free?

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

### Do SignOver or IOL Reference have ads?

Neither SignOver nor IOL Reference shows ads.

### Which is updated more often, SignOver or IOL Reference?

SignOver ships an update every 2 weeks, and IOL Reference weekly. Most recently, SignOver was updated on September 9, 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.*