# ABG Calculator vs PFT Spirometry

The clearest difference is in-app purchases: ABG Calculator at none against PFT Spirometry's 2. ABG Calculator also leads on iOS requirement (18.2 vs 26.0). PFT Spirometry's advantage is update cadence (every 2 months vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. PFT Spirometry sells 2 in-app purchases, starting at $7.99 per month. ABG Calculator asks for nothing beyond the download.

ABG Calculator ships an update every 4 months, PFT Spirometry every 2 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ABG Calculator | PFT Spirometry |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **18.2** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 17+ |
| Developer | [Hamza Crichlow](https://appshunter.io/developer/1842860402) | [ABHISHEK KUMAR](https://appshunter.io/developer/1877547879) |

## What reviewers say

### 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


### PFT Spirometry

[App page](https://appshunter.io/ios/app/pft-spirometry/id6787568741)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PFT Premium Monthly | $7.99 | per month |
| PFT Premium Yearly | $79.99 | per year |


## Frequently asked questions

### Is ABG Calculator free?

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

### Is PFT Spirometry free?

PFT Spirometry is free to download, with in-app purchases available.

### Do ABG Calculator or PFT Spirometry have ads?

Neither ABG Calculator nor PFT Spirometry shows ads.

### Which is updated more often, ABG Calculator or PFT Spirometry?

ABG Calculator ships an update every 4 months, and PFT Spirometry every 2 months. Most recently, ABG Calculator was updated on October 30, 2026 and PFT Spirometry on November 5, 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.*