# Upper Respiratory Virtual Lab vs ABG Expert

The clearest difference is rating: ABG Expert at 4.8 against Upper Respiratory Virtual Lab's 4.4. ABG Expert also leads on update cadence (every 5 months vs every 20 months) and review sentiment (100% vs 84%). Upper Respiratory Virtual Lab's advantage is iOS requirement (11.0 vs 13.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

ABG Expert holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 8 and 9 respectively. Written reviews point the same way: 84% of Upper Respiratory Virtual Lab's written reviews are positive against 100% of ABG Expert's.

Upper Respiratory Virtual Lab ships an update every 20 months, ABG Expert every 5 months. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Upper Respiratory Virtual Lab | ABG Expert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (8 ratings)](https://appshunter.io/ios/app/upper-respiratory-virtual-lab/id435530624/reviews) | **[4.8 (9 ratings)](https://appshunter.io/ios/app/abg-expert/id885575488/reviews)** |
| Number of ratings | 8 | **9** |
| Positive reviews | 84.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 169 MB | 2 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Augusta University](https://appshunter.io/developer/319778530) | [Brian Dale Vander Werf MD Inc](https://appshunter.io/developer/1521935908) |

## What reviewers say

### Upper Respiratory Virtual Lab

[App page](https://appshunter.io/ios/app/upper-respiratory-virtual-lab/id435530624)

Explore upper airway anatomy in a 3D simulator. Access clinical information, photographs, and illustrations through tappable targets. Offers detailed views and easy navigation for a unique learning experience.

**Highlights:** 3D upper airway simulation, Tappable anatomical targets, Clinical information access, Detailed anatomical structure views, Cross-section overview, Free-range navigation

**Features:** macOS Compatibility

**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 Upper Respiratory Virtual Lab free?

Upper Respiratory Virtual Lab is free to download, with no in-app purchases.

### Is ABG Expert free?

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

### Which has better reviews, Upper Respiratory Virtual Lab or ABG Expert?

ABG Expert is rated higher. Upper Respiratory Virtual Lab averages 4.4 out of 5 from 8 ratings, while ABG Expert averages 4.8 from 9 ratings.

### Do Upper Respiratory Virtual Lab or ABG Expert have ads?

Neither Upper Respiratory Virtual Lab nor ABG Expert shows ads.

### Which is updated more often, Upper Respiratory Virtual Lab or ABG Expert?

Upper Respiratory Virtual Lab ships an update every 20 months, and ABG Expert every 5 months. Most recently, Upper Respiratory Virtual Lab was updated on October 7, 2026 and ABG Expert on October 3, 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.*