# Cyl Duration vs Ventilator Training Alliance

The clearest difference is review sentiment: Ventilator Training Alliance at 93% against Cyl Duration's 42%. Ventilator Training Alliance also leads on update cadence (fortnightly vs every 49 months) and rating (4.9 vs 4.6). Cyl Duration's advantage is iOS requirement (10.0 vs 12.0). 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.

Ventilator Training Alliance holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Ventilator Training Alliance has 74 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 42% of Cyl Duration's written reviews are positive against 93% of Ventilator Training Alliance's.

Cyl Duration ships an update every 49 months, Ventilator Training Alliance fortnightly. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Cyl Duration | Ventilator Training Alliance |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (11 ratings)](https://appshunter.io/ios/app/cyl-duration/id447311122/reviews) | **[4.9 (74 ratings)](https://appshunter.io/ios/app/ventilator-training-alliance/id1507082978/reviews)** |
| Number of ratings | 11 | **74** |
| Positive reviews | 41.7% of reviews | **93.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 17 MB | 87 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Responsive Respiratory, Inc.](https://appshunter.io/developer/447311125) | [Allego, Inc.](https://appshunter.io/developer/640352525) |

## What reviewers say

### Cyl Duration

[App page](https://appshunter.io/ios/app/cyl-duration/id447311122)

Calculates remaining oxygen in a cylinder for ambulatory users. Input device, liter flow, and cylinder size for precise remaining hours and minutes. Provides peace of mind for oxygen users on the go.

**Highlights:** Calculate remaining oxygen hours/minutes, Input device settings, Input liter flow, Input cylinder size, Precise readout

**Features:** macOS Compatibility

**In-app purchases:** none


### Ventilator Training Alliance

[App page](https://appshunter.io/ios/app/ventilator-training-alliance/id1507082978)

Access a comprehensive library of training materials and product information for medical professionals. This app offers free mobile access to how-to videos, manuals, and guides for critical ventilator equipment, developed in partnership with leading manufacturers.

**Highlights:** Multi-vendor training library, Product materials for medical professionals, How-to videos, Product manuals, Reference guides, Free mobile access

**In-app purchases:** none


## Frequently asked questions

### Is Cyl Duration free?

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

### Is Ventilator Training Alliance free?

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

### Which has better reviews, Cyl Duration or Ventilator Training Alliance?

Ventilator Training Alliance is rated higher. Cyl Duration averages 4.6 out of 5 from 11 ratings, while Ventilator Training Alliance averages 4.9 from 74 ratings.

### Do Cyl Duration or Ventilator Training Alliance have ads?

Neither Cyl Duration nor Ventilator Training Alliance shows ads.

### Which is updated more often, Cyl Duration or Ventilator Training Alliance?

Cyl Duration ships an update every 49 months, and Ventilator Training Alliance fortnightly. Most recently, Cyl Duration was updated on October 23, 2026 and Ventilator Training Alliance on October 20, 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.*