# OCS vs ICU Communication App

The clearest difference is device support: OCS at 3 against ICU Communication App's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

OCS ships an update every 12 months, ICU Communication App every 7 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | OCS | ICU Communication App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 7 months** |
| Size | 138 MB | 25 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 12+ | 4+ |
| Developer | [University of Oxford](https://appshunter.io/developer/688778837) | [Barnsley Hospital NHS Foundation Trust](https://appshunter.io/developer/1516446510) |

## What reviewers say

### OCS

[App page](https://appshunter.io/ios/app/ocs-plus/id1514766032)

**Features:** Vision Pro support

**In-app purchases:** none


### ICU Communication App

[App page](https://appshunter.io/ios/app/icu-communication-app/id1516446511)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OCS free?

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

### Is ICU Communication App free?

ICU Communication App is free to download, with no in-app purchases.

### Do OCS or ICU Communication App have ads?

Neither OCS nor ICU Communication App shows ads.

### Which is updated more often, OCS or ICU Communication App?

OCS ships an update every 12 months, and ICU Communication App every 7 months. Most recently, OCS was updated on November 7, 2026 and ICU Communication App on November 7, 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.*