# ICU Advantage Rapid Reference vs ShockRef

The clearest difference is in-app purchases: ShockRef at none against ICU Advantage Rapid Reference's 2. ShockRef also leads on update cadence (every 4 days vs every 2 weeks). ICU Advantage Rapid Reference's advantage is ratings volume (140 vs 3) and chart position (#87 vs unranked). On price, rating, ads and device support there is nothing between them.

Both are free to download. ICU Advantage Rapid Reference sells 2 in-app purchases, starting at $15.00 per month. ShockRef asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for ICU Advantage Rapid Reference against 5.0 for ShockRef. That said, the two scores are not equally well evidenced: ICU Advantage Rapid Reference has 140 ratings behind it against 3, so its average is the more settled of the two.

ICU Advantage Rapid Reference ships an update every 2 weeks, ShockRef every 4 days. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ICU Advantage Rapid Reference | ShockRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (140 ratings)](https://appshunter.io/ios/app/icu-advantage-rapid-reference/id6763389459/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/shockref/id6793122630/reviews)** |
| Number of ratings | **140** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#87** | — |
| Size | 93 MB | 15 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ICU Advantage LLC](https://appshunter.io/developer/1895291008) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### ICU Advantage Rapid Reference

[App page](https://appshunter.io/ios/app/icu-advantage-rapid-reference/id6763389459)

**Currently charting:** #87 Top Grossing · Medical (US App Store)

This clinical reference tool helps critical care professionals understand complex patient conditions. It provides organ-system-based information, ventilator settings, drug references, calculators, and interactive protocols. Designed for nurses, therapists, and providers, it focuses on deep understanding rather than just quick lookups.

**Highlights:** Organ-system-based clinical reference, Ventilator settings and troubleshooting, Drug references with dosing and pearls, Calculators and scoring systems, Interactive emergency protocols, Offline access to content, Search functionality

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rapid Reference Monthly | $15.00 | per month |
| Rapid Reference Annual | $129.00 | per year |


### ShockRef

[App page](https://appshunter.io/ios/app/shockref/id6793122630)

A clinical reference for managing shock and hemodynamics, offering insights into bedside physiology, resuscitation, and mechanical circulatory support. It includes practical calculators and drug references for critical care professionals and students.

**Highlights:** Shock phenotyping, Resuscitation workflows, Vasoactive drug references, Mechanical circulatory support troubleshooting, Physiology-based critical care, Practical calculators

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

**In-app purchases:** none


## Frequently asked questions

### Is ICU Advantage Rapid Reference free?

ICU Advantage Rapid Reference is free to download, with in-app purchases available.

### Is ShockRef free?

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

### Which has better reviews, ICU Advantage Rapid Reference or ShockRef?

ShockRef is rated higher. ICU Advantage Rapid Reference averages 4.9 out of 5 from 140 ratings, while ShockRef averages 5.0 from 3 ratings.

### Do ICU Advantage Rapid Reference or ShockRef have ads?

Neither ICU Advantage Rapid Reference nor ShockRef shows ads.

### Which is updated more often, ICU Advantage Rapid Reference or ShockRef?

ICU Advantage Rapid Reference ships an update every 2 weeks, and ShockRef every 4 days. Most recently, ICU Advantage Rapid Reference was updated on October 14, 2026 and ShockRef on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*