# ICU vs ABG Expert

The clearest difference is review sentiment: ABG Expert at 100% against ICU's 40%. ABG Expert also leads on price (Free vs $2.99) and rating (4.8 vs 1.0). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

ABG Expert is free to download; ICU costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ABG Expert holds the better App Store score, 4.8 against 1.0. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews point the same way: 40% of ICU's written reviews are positive against 100% of ABG Expert's.

ICU ships an update every 20 months, ABG Expert every 5 months. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ICU | ABG Expert |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.0 (3 ratings)](https://appshunter.io/ios/app/icu-card/id567631128/reviews) | **[4.8 (9 ratings)](https://appshunter.io/ios/app/abg-expert/id885575488/reviews)** |
| Number of ratings | 3 | **9** |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Paid | **Free** |
| Size | 8 MB | 2 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [ScyMed, Inc](https://appshunter.io/developer/545140733) | [Brian Dale Vander Werf MD Inc](https://appshunter.io/developer/1521935908) |

## What reviewers say

### ICU

[App page](https://appshunter.io/ios/app/icu-card/id567631128)

Provides essential data, formulas, and drug information for intensive care units. Access critical values for hemodynamics, pulmonary, renal, and nutrition, developed by board-certified physicians.

**Highlights:** ICU Drugs and Dosages, Ventilator Criteria, Hemodynamic Formulas, Renal Clearances, Electrolyte and Acid-Base Metabolism, Body Water and Mass Calculations, Printed version images included

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

**In-app purchases:** none


### ABG Expert

[App page](https://appshunter.io/ios/app/abg-expert/id885575488)

This medical tool provides accurate and flexible acid-base analysis for healthcare professionals. It offers detailed explanations, customizable ranges, and advanced features like anion gap correction and A-a gradient adjustments for various patient conditions and locations.

**Highlights:** Validated accuracy with real-world testing, Plausibility checks for physiologically impossible data, Automatic anion gap correction with albumin, Detailed explanations with equations, Separate or combined analysis of ABG, anion gap, A-a gradient, Customizable normal ranges for anion gap and delta gap, Age and barometric pressure adjustments for A-a gradient, Support for SI and non-SI units, Color-coded results and differential diagnoses, Adjustments for chronic respiratory conditions

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ICU free?

ICU costs $2.99, with no in-app purchases.

### Is ABG Expert free?

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

### Which has better reviews, ICU or ABG Expert?

ABG Expert is rated higher. ICU averages 1.0 out of 5 from 3 ratings, while ABG Expert averages 4.8 from 9 ratings.

### Do ICU or ABG Expert have ads?

Neither ICU nor ABG Expert shows ads.

### Which is updated more often, ICU or ABG Expert?

ICU ships an update every 20 months, and ABG Expert every 5 months. Most recently, ICU was updated on October 29, 2026 and ABG Expert on October 20, 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.*