# Cyl Duration vs Masimo SafetyNet

The clearest difference is update cadence: Masimo SafetyNet at monthly against Cyl Duration's every 49 months. Masimo SafetyNet also leads on ratings volume (367 vs 11) and review sentiment (63% vs 46%). Cyl Duration's advantage is iOS requirement (10.0 vs 16.5.1). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.6 for Cyl Duration against 4.7 for Masimo SafetyNet. That said, the two scores are not equally well evidenced: Masimo SafetyNet has 367 ratings behind it against 11, so its average is the more settled of the two. Written reviews are what separate them: 46% of Cyl Duration's written reviews are positive against 63% of Masimo SafetyNet's.

Cyl Duration ships an update every 49 months, Masimo SafetyNet monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Cyl Duration | Masimo SafetyNet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (11 ratings)](https://appshunter.io/ios/app/cyl-duration/id447311122/reviews) | **[4.7 (367 ratings)](https://appshunter.io/ios/app/masimo-safetynet/id1503637505/reviews)** |
| Number of ratings | 11 | **367** |
| Positive reviews | 46.2% of reviews | **63.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Monthly** |
| Monetization | Free | Free |
| Size | 17 MB | 265 MB |
| Requires iOS | **10.0** | 16.5.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Responsive Respiratory, Inc.](https://appshunter.io/developer/447311125) | [Masimo Corporation](https://appshunter.io/developer/568979269) |

## 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


### Masimo SafetyNet

[App page](https://appshunter.io/ios/app/masimo-safetynet/id1503637505)

This platform enables healthcare providers to remotely manage patients through digital CarePrograms delivered to smartphones. It actively reminds patients of their care plans and collects monitoring data from tetherless sensors for clinician evaluation.

**Highlights:** Remote patient management, Digital CarePrograms, Smartphone delivery, Automated patient reminders, Continuous monitoring data capture, Tetherless Radius PPG sensor, Integration with Apple Health

**In-app purchases:** none


## Frequently asked questions

### Is Cyl Duration free?

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

### Is Masimo SafetyNet free?

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

### Which has better reviews, Cyl Duration or Masimo SafetyNet?

Masimo SafetyNet is rated higher. Cyl Duration averages 4.6 out of 5 from 11 ratings, while Masimo SafetyNet averages 4.7 from 367 ratings.

### Do Cyl Duration or Masimo SafetyNet have ads?

Neither Cyl Duration nor Masimo SafetyNet shows ads.

### Which is updated more often, Cyl Duration or Masimo SafetyNet?

Cyl Duration ships an update every 49 months, and Masimo SafetyNet monthly. Most recently, Cyl Duration was updated on November 1, 2026 and Masimo SafetyNet on November 3, 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.*