# One Ref by Messly vs iRefer

The clearest difference is in-app purchases: One Ref by Messly at none against iRefer's 1. One Ref by Messly also leads on iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. iRefer sells 1 in-app purchase, starting at $149.99 per year. One Ref by Messly asks for nothing beyond the download.

## The numbers

| Metric | One Ref by Messly | iRefer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Size | 39 MB | 34 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Messly](https://appshunter.io/developer/1337787870) | [The Royal College of Radiologists](https://appshunter.io/developer/1361218734) |

## What reviewers say

### One Ref by Messly

[App page](https://appshunter.io/ios/app/one-ref-by-messly/id6449292220)

**Features:** macOS Compatibility

**In-app purchases:** none


### iRefer

[App page](https://appshunter.io/ios/app/irefer/id6550924402)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iRefer Individual Plan | $149.99 | per year |


## Frequently asked questions

### Is One Ref by Messly free?

One Ref by Messly is free to download, with no in-app purchases.

### Is iRefer free?

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

### Do One Ref by Messly or iRefer have ads?

Neither One Ref by Messly nor iRefer 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.*