# iCCS vs The Ottawa Rules

The clearest difference is review sentiment: The Ottawa Rules at 100% against iCCS's 25%. The Ottawa Rules also leads on rating (5.0 vs 3.7) and iOS requirement (9.0 vs 16.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

The Ottawa Rules holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 25% of iCCS's written reviews are positive against 100% of The Ottawa Rules's.

iCCS ships an update every 4 months, The Ottawa Rules every 2 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | iCCS | The Ottawa Rules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/iccs/id932264994/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/the-ottawa-rules/id1104004722/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 4 MB | 155 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Canadian Cardiovascular Society](https://appshunter.io/developer/394802817) | [Ottawa Hospital Research Institute](https://appshunter.io/developer/574951918) |

## What reviewers say

### iCCS

[App page](https://appshunter.io/ios/app/iccs/id932264994)

Access comprehensive cardiovascular guidelines and knowledge translation tools. This app provides the full text of key guidelines, along with supplementary resources like infographics, webinars, and pocket guides. New guidelines and tools will be added periodically.

**Highlights:** Comprehensive CCS Guidelines, Knowledge Translation Tools, Infographics and Webinars, Pocket Guides and Summary Sheets, Regularly Updated Content

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

**In-app purchases:** none


### The Ottawa Rules

[App page](https://appshunter.io/ios/app/the-ottawa-rules/id1104004722)

This app provides accessible clinical decision rules developed by researchers to help healthcare professionals make informed choices. It aims to reduce unnecessary diagnostic imaging and emergency room wait times, improving patient comfort and healthcare costs.

**Highlights:** Accessible clinical decision rules, Reduces unnecessary imaging, Decreases ER wait times, Enhances patient comfort, Lowers healthcare costs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iCCS free?

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

### Is The Ottawa Rules free?

The Ottawa Rules is free to download, with no in-app purchases.

### Which has better reviews, iCCS or The Ottawa Rules?

The Ottawa Rules is rated higher. iCCS averages 3.7 out of 5 from 3 ratings, while The Ottawa Rules averages 5.0 from 2 ratings.

### Do iCCS or The Ottawa Rules have ads?

Neither iCCS nor The Ottawa Rules shows ads.

### Which is updated more often, iCCS or The Ottawa Rules?

iCCS ships an update every 4 months, and The Ottawa Rules every 2 months. Most recently, iCCS was updated on October 7, 2026 and The Ottawa Rules on October 9, 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.*