# Critical ABG vs Quick Reference Critical Care

The clearest difference is price: Quick Reference Critical Care at Free against Critical ABG's $3.99. Quick Reference Critical Care also leads on rating (4.9 vs 4.0) and update cadence (every 6 months vs every 42 months). Critical ABG's advantage is in-app purchases (none vs 2) and ads (none vs shown). On ratings volume and device support there is nothing between them.

Quick Reference Critical Care is free to download; Critical ABG costs $3.99 up front. Quick Reference Critical Care sells 2 in-app purchases, starting at $39.99 per 6 months. Critical ABG asks for nothing beyond the download.

Quick Reference Critical Care holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 4 and 10 respectively.

Critical ABG ships an update every 42 months, Quick Reference Critical Care every 6 months. The most recent releases landed on October 21, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Critical ABG | Quick Reference Critical Care |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/critical-abg/id1438674467/reviews) | **[4.9 (10 ratings)](https://appshunter.io/ios/app/quick-reference-critical-care/id1568426076/reviews)** |
| Number of ratings | 4 | **10** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 42 months | **Every 6 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#199** | — |
| Size | 3 MB | 46 MB |
| Requires iOS | 15.2 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [The Barringer Group, LLC](https://appshunter.io/developer/504065735) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### Critical ABG

[App page](https://appshunter.io/ios/app/critical-abg/id1438674467)

**Currently charting:** #199 Top Paid · Medical (US App Store)

This medical app provides a comprehensive analysis of acid-base disorders with a step-by-step approach to understanding them. It includes common causes, differential treatment options, and built-in compensation mechanisms. An optimization calculator for ventilator settings is also available.

**Highlights:** Acid-base disorder analysis, Step-by-step understanding, Common causes and treatments, Compensation mechanisms, Ventilation optimization calculator, Differential diagnosis

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

**In-app purchases:** none


### Quick Reference Critical Care

[App page](https://appshunter.io/ios/app/quick-reference-critical-care/id1568426076)

This app provides immediate, on-the-job answers for critical care professionals. It offers updated, evidence-based procedures and stabilization practices in a quick-read outline format, covering a broad range of patient topics by body system.

**Highlights:** Updated critical care content, Full-color images, Extensive abbreviations list, Bulleted outline format, Over 350 illustrations, Body system chapters, SmartSearch technology

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quick Ref-Critical Care 6M Sub | $39.99 | per 6 months |
| Quick Ref-Critical Care 1Y Sub | $59.99 | per year |


## Frequently asked questions

### Is Critical ABG free?

Critical ABG costs $3.99, with no in-app purchases.

### Is Quick Reference Critical Care free?

Quick Reference Critical Care is free to download, with in-app purchases available.

### Which has better reviews, Critical ABG or Quick Reference Critical Care?

Quick Reference Critical Care is rated higher. Critical ABG averages 4.0 out of 5 from 4 ratings, while Quick Reference Critical Care averages 4.9 from 10 ratings.

### Do Critical ABG or Quick Reference Critical Care have ads?

Quick Reference Critical Care shows ads; Critical ABG does not.

### Which is updated more often, Critical ABG or Quick Reference Critical Care?

Critical ABG ships an update every 42 months, and Quick Reference Critical Care every 6 months. Most recently, Critical ABG was updated on October 21, 2026 and Quick Reference Critical Care on October 14, 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.*