# Ventilator Guide vs ABG Calculator

The clearest difference is update cadence: ABG Calculator at every 4 months against Ventilator Guide's every 30 months. Ventilator Guide's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 18.2). On price, 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.

Ventilator Guide ships an update every 30 months, ABG Calculator every 4 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Ventilator Guide | ABG Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/abg-calculator-pulmoro/id6753176045/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 116 MB | 6 MB |
| Requires iOS | **11.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [OSF Healthcare System](https://appshunter.io/developer/1053621635) | [Hamza Crichlow](https://appshunter.io/developer/1842860402) |

## What reviewers say

### Ventilator Guide

[App page](https://appshunter.io/ios/app/ventilator-guide/id1522572803)

**Features:** macOS Compatibility

**In-app purchases:** none


### ABG Calculator

[App page](https://appshunter.io/ios/app/abg-calculator-pulmoro/id6753176045)

This clinical decision support app assists healthcare professionals in managing patients with respiratory conditions. It offers evidence-based calculations, guided interpretations of arterial blood gases, and educational context for real-time bedside care. The tool aims to simplify critical decisions while maintaining depth and accuracy.

**Highlights:** Arterial blood gas (ABG) interpretations, Integrated oxygenation analysis, Respiratory and ventilator focused calculators, Case studies for practical application, Offline functionality, Light and dark mode support

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

**In-app purchases:** none


## Frequently asked questions

### Is Ventilator Guide free?

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

### Is ABG Calculator free?

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

### Do Ventilator Guide or ABG Calculator have ads?

Neither Ventilator Guide nor ABG Calculator shows ads.

### Which is updated more often, Ventilator Guide or ABG Calculator?

Ventilator Guide ships an update every 30 months, and ABG Calculator every 4 months. Most recently, Ventilator Guide was updated on November 7, 2026 and ABG Calculator on October 30, 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.*