# ABG Expert vs PulmTools

The clearest difference is update cadence: PulmTools at every 5 days against ABG Expert's every 5 months. PulmTools also leads on rating (5.0 vs 4.8). ABG Expert's advantage is iOS requirement (13.0 vs 18.5). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PulmTools holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ABG Expert ships an update every 5 months, PulmTools every 5 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ABG Expert | PulmTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (9 ratings)](https://appshunter.io/ios/app/abg-expert/id885575488/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/pulmtools-abg-and-vbg-analyzer/id6770799843/reviews)** |
| Number of ratings | **9** | 8 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 2 MB | 55 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Brian Dale Vander Werf MD Inc](https://appshunter.io/developer/1521935908) | [Ledgeworks LLC](https://appshunter.io/developer/1896763783) |

## 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


### PulmTools

[App page](https://appshunter.io/ios/app/pulmtools-abg-and-vbg-analyzer/id6770799843)

This medical app helps clinicians and students interpret blood gas results, utilize clinical calculators, and practice realistic cases. It offers tools for respiratory and critical care, with progress tracking available via a free account.

**Highlights:** Interpret ABGs and VBGs, Clinical calculators and references, Realistic case practice, Progress tracking, Breathing exercises, Trend analysis

**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 PulmTools free?

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

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

PulmTools is rated higher. ABG Expert averages 4.8 out of 5 from 9 ratings, while PulmTools averages 5.0 from 8 ratings.

### Do ABG Expert or PulmTools have ads?

Neither ABG Expert nor PulmTools shows ads.

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

ABG Expert ships an update every 5 months, and PulmTools every 5 days. Most recently, ABG Expert was updated on November 1, 2026 and PulmTools on October 31, 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.*