# Alveolar vs Mechanical Ventilation Expert

The clearest difference is review sentiment: Alveolar at 89% against Mechanical Ventilation Expert's 33%. Alveolar also leads on rating (5.0 vs 1.8) and iOS requirement (8.0 vs 13.0). Mechanical Ventilation Expert's advantage is update cadence (every 2 weeks vs every 4 months) and ratings volume (8 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Alveolar holds the better App Store score, 5.0 against 1.8. That said, the two scores are not equally well evidenced: Mechanical Ventilation Expert has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 89% of Alveolar's written reviews are positive against 33% of Mechanical Ventilation Expert's.

Alveolar ships an update every 4 months, Mechanical Ventilation Expert every 2 weeks. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Alveolar | Mechanical Ventilation Expert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/alveolar-arterial-a-a-gradient/id996385661/reviews)** | [1.8 (8 ratings)](https://appshunter.io/ios/app/mechanical-ventilation-expert/id1591944892/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | **88.9% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 1 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Satish Deopujari](https://appshunter.io/developer/1180072702) | [Valeriy Streltsov](https://appshunter.io/developer/1324697386) |

## What reviewers say

### Alveolar

[App page](https://appshunter.io/ios/app/alveolar-arterial-a-a-gradient/id996385661)

This app calculates the alveolar-arterial oxygen gradient (A-a gradient) and the PaO2/FiO2 ratio. It provides formulas and explanations for these important respiratory measurements, useful for medical professionals and students.

**Highlights:** Alveolar-arterial oxygen gradient calculation, PaO2/FiO2 ratio calculation, Formulas for PAO2 and A-a gradient, Educational explanations of respiratory measurements, Supports room air and variable FiO2

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

**In-app purchases:** none


### Mechanical Ventilation Expert

[App page](https://appshunter.io/ios/app/mechanical-ventilation-expert/id1591944892)

This medical app assists intensive care physicians in managing patients with acute respiratory failure. It provides advice on mechanical ventilation parameters and helps determine optimal respiratory support methods based on research findings.

**Highlights:** Mechanical ventilation parameter correction, Respiratory support method selection, Non-invasive oxygenation index estimation, Guidance on invasive and non-invasive ventilation, Educational tool for physicians, Based on multicenter research

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alveolar free?

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

### Is Mechanical Ventilation Expert free?

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

### Which has better reviews, Alveolar or Mechanical Ventilation Expert?

Alveolar is rated higher. Alveolar averages 5.0 out of 5 from 1 ratings, while Mechanical Ventilation Expert averages 1.8 from 8 ratings.

### Do Alveolar or Mechanical Ventilation Expert have ads?

Neither Alveolar nor Mechanical Ventilation Expert shows ads.

### Which is updated more often, Alveolar or Mechanical Ventilation Expert?

Alveolar ships an update every 4 months, and Mechanical Ventilation Expert every 2 weeks. Most recently, Alveolar was updated on November 4, 2026 and Mechanical Ventilation Expert on November 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.*