# Guide Rx Critiques vs SURF

The clearest difference is review sentiment: SURF at 67% against Guide Rx Critiques's 19%. Guide Rx Critiques's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (12.0 vs 16.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Guide Rx Critiques sells 1 in-app purchase, starting at $9.99 per year and SURF sells 1 in-app purchase, starting at $99.99 per year. Whichever you choose, the download price is not the number that matters.

Guide Rx Critiques ships an update every 6 months, SURF every 5 months. The most recent releases landed on September 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Guide Rx Critiques | SURF |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 19.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 55 MB | 204 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [L'Institut universitaire de cardiologie et de pneumologie de Québec (IUCPQ)](https://appshunter.io/developer/576953454) | [Philippe FURGER](https://appshunter.io/developer/1055742280) |

## What reviewers say

### Guide Rx Critiques

[App page](https://appshunter.io/ios/app/guide-rx-critiques/id580149889)

This app provides a practical reference for healthcare professionals administering critical intravenous medications. It includes information on classification, action, indications, dosages, stability, and compatibility for approximately sixty commonly used drugs in critical care. A free version offers reduced content, with a full subscription unlocking all features and updates.

**Highlights:** Critical care medication reference, Drug classification and action, Dosage and presentation information, Stability and compatibility data, Perfusion tables, Full guide subscription

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Abonnement au guide complet | $9.99 | per year |


### SURF

[App page](https://appshunter.io/ios/app/surf/id1055743301)

Access evidence-based medical content for internal medicine, differential diagnosis, and lab values. This comprehensive guide is designed for residents, general practitioners, and specialists, offering a vast amount of information from multiple expert-authored books.

**Highlights:** Evidence-based medical content, Differential diagnosis of symptoms, Lab value interpretation, Comprehensive internal medicine, Links to external calculators, Accessible on multiple devices

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 year | $99.99 | per year |


## Frequently asked questions

### Is Guide Rx Critiques free?

Guide Rx Critiques is free to download, with in-app purchases available.

### Is SURF free?

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

### Do Guide Rx Critiques or SURF have ads?

Neither Guide Rx Critiques nor SURF shows ads.

### Which is updated more often, Guide Rx Critiques or SURF?

Guide Rx Critiques ships an update every 6 months, and SURF every 5 months. Most recently, Guide Rx Critiques was updated on September 12, 2026 and SURF on September 22, 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.*