# Rapid Vent Calculator vs Protocol Now App

The clearest difference is in-app purchases: Rapid Vent Calculator at none against Protocol Now App's 2. Rapid Vent Calculator also leads on iOS requirement (13.0 vs 15.1). Protocol Now App's advantage is update cadence (every 5 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Protocol Now App sells 2 in-app purchases, starting at $0.99 per month. Rapid Vent Calculator asks for nothing beyond the download.

Rapid Vent Calculator ships an update every 4 months, Protocol Now App every 5 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Rapid Vent Calculator | Protocol Now App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (47 ratings)](https://appshunter.io/ios/app/rapid-vent-calculator/id6451494244/reviews)** | — |
| Number of ratings | **47** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 48 MB | 77 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [JENCO LLC](https://appshunter.io/developer/1698545004) | [Protocol Now, Inc](https://appshunter.io/developer/1603125909) |

## What reviewers say

### Rapid Vent Calculator

[App page](https://appshunter.io/ios/app/rapid-vent-calculator/id6451494244)

This medical app assists healthcare professionals in calculating essential ventilator settings and medication dosages for critical care. It provides rapid, accurate results for paramedics, respiratory therapists, nurses, and doctors, streamlining patient management.

**Highlights:** Effortless ventilator settings calculation, Rapid results for quick decision-making, RSI medication dosage assistant, User-friendly interface for medical professionals, Accurate patient parameter input

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

**In-app purchases:** none


### Protocol Now App

[App page](https://appshunter.io/ios/app/protocol-now-app/id6742812869)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Annual subscription Plan | $7.99 | per year |


## Frequently asked questions

### Is Rapid Vent Calculator free?

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

### Is Protocol Now App free?

Protocol Now App is free to download, with in-app purchases available.

### Do Rapid Vent Calculator or Protocol Now App have ads?

Neither Rapid Vent Calculator nor Protocol Now App shows ads.

### Which is updated more often, Rapid Vent Calculator or Protocol Now App?

Rapid Vent Calculator ships an update every 4 months, and Protocol Now App every 5 days. Most recently, Rapid Vent Calculator was updated on October 7, 2026 and Protocol Now App on October 8, 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.*