# Lanthier vs The Ottawa Rules

The clearest difference is rating: The Ottawa Rules at 5.0 against Lanthier's 3.8. The Ottawa Rules also leads on review sentiment (100% vs 62%) and in-app purchases (none vs 2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Lanthier sells 2 in-app purchases, starting at $19.49 per year. The Ottawa Rules asks for nothing beyond the download.

The Ottawa Rules holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 62% of Lanthier's written reviews are positive against 100% of The Ottawa Rules's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Lanthier | The Ottawa Rules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/lanthier/id701664895/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/the-ottawa-rules/id1104004722/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 61.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Subscription | **Free** |
| Size | 70 MB | 155 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Les Éditions Formed inc.](https://appshunter.io/developer/442932971) | [Ottawa Hospital Research Institute](https://appshunter.io/developer/574951918) |

## What reviewers say

### Lanthier

[App page](https://appshunter.io/ios/app/lanthier/id701664895)

Access up-to-date internal medicine information and guidelines quickly and efficiently. This app offers a fast search function, intuitive menus, and direct links to PubMed references. It's designed for physicians, residents, and medical students to use at the bedside.

**Highlights:** Concise bedside information, Advanced search function, Intuitive menus, Direct links to PubMed, Personal note-taking, Cross-device synchronization

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lanthier - current users | $19.49 | per year |
| Lanthier - new users | $19.49 | per year |


### 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 Lanthier free?

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

### Is The Ottawa Rules free?

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

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

The Ottawa Rules is rated higher. Lanthier averages 3.8 out of 5 from 5 ratings, while The Ottawa Rules averages 5.0 from 2 ratings.

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

Neither Lanthier nor The Ottawa Rules shows ads.

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

Lanthier ships an update every 2 months, and The Ottawa Rules every 2 months. Most recently, Lanthier was updated on October 14, 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.*