# Alveolar vs Ventilator Mode Map

The clearest difference is rating: Alveolar at 5.0 against Ventilator Mode Map's 4.8. Alveolar also leads on iOS requirement (8.0 vs 17.0). Ventilator Mode Map's advantage is ratings volume (8 vs 1). On price, update cadence, 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.

Alveolar holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Ventilator Mode Map has 8 ratings behind it against 1, so its average is the more settled of the two.

Alveolar ships an update every 4 months, Ventilator Mode Map every 3 months. The most recent releases landed on October 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Alveolar | Ventilator Mode Map |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/alveolar-arterial-a-a-gradient/id996385661/reviews)** | [4.8 (8 ratings)](https://appshunter.io/ios/app/ventilator-mode-map/id1508307955/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 16 MB | 40 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Satish Deopujari](https://appshunter.io/developer/1180072702) | [The Cleveland Clinic Foundation](https://appshunter.io/developer/468225376) |

## 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


### Ventilator Mode Map

[App page](https://appshunter.io/ios/app/ventilator-mode-map/id1508307955)

This app classifies mechanical ventilation modes based on a recognized medical taxonomy. It provides images and details for numerous ventilators worldwide, including manufacturer and model information.

**Highlights:** Mechanical ventilation mode taxonomy implementation, Ventilator manufacturer and model details, Ventilator images, Global ventilator database

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

**In-app purchases:** none


## Frequently asked questions

### Is Alveolar free?

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

### Is Ventilator Mode Map free?

Ventilator Mode Map is free to download, with no in-app purchases.

### Which has better reviews, Alveolar or Ventilator Mode Map?

Alveolar is rated higher. Alveolar averages 5.0 out of 5 from 1 ratings, while Ventilator Mode Map averages 4.8 from 8 ratings.

### Do Alveolar or Ventilator Mode Map have ads?

Neither Alveolar nor Ventilator Mode Map shows ads.

### Which is updated more often, Alveolar or Ventilator Mode Map?

Alveolar ships an update every 4 months, and Ventilator Mode Map every 3 months. Most recently, Alveolar was updated on October 15, 2026 and Ventilator Mode Map on October 22, 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.*