# ABG Expert vs ABG Calculator

The clearest difference is price: ABG Expert at Free against ABG Calculator's $9.99. ABG Expert also leads on ratings volume (9 vs 2). ABG Calculator's advantage is rating (5.0 vs 4.8) and iOS requirement (11.0 vs 13.0). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

ABG Expert is free to download; ABG Calculator costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ABG Calculator holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 9 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ABG Expert ships an update every 5 months, ABG Calculator every 3 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ABG Expert | ABG Calculator |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [4.8 (9 ratings)](https://appshunter.io/ios/app/abg-expert/id885575488/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abg-calculator/id6743676456/reviews)** |
| Number of ratings | **9** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free** | Paid |
| Size | 2 MB | 8 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Brian Dale Vander Werf MD Inc](https://appshunter.io/developer/1521935908) | [SAGA Virtual Tecnologia Ltda](https://appshunter.io/developer/1455930511) |

## What reviewers say

### 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


### ABG Calculator

[App page](https://appshunter.io/ios/app/abg-calculator/id6743676456)

This medical tool quickly analyzes arterial blood gas results for healthcare professionals. It calculates acid-base status, anion gap, and compensation, offering comprehensive diagnoses offline. Save and share patient results for efficient clinical decision-making.

**Highlights:** Offline arterial blood gas analysis, Instant acid-base disorder determination, Anion gap and compensation assessment, Flexible unit options, Save and share patient results, Results history and search

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

**In-app purchases:** none


## Frequently asked questions

### Is ABG Expert free?

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

### Is ABG Calculator free?

ABG Calculator costs $9.99, with no in-app purchases.

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

ABG Calculator is rated higher. ABG Expert averages 4.8 out of 5 from 9 ratings, while ABG Calculator averages 5.0 from 2 ratings.

### Do ABG Expert or ABG Calculator have ads?

Neither ABG Expert nor ABG Calculator shows ads.

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

ABG Expert ships an update every 5 months, and ABG Calculator every 3 months. Most recently, ABG Expert was updated on October 20, 2026 and ABG Calculator on October 24, 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.*