# Cyl Duration > Oxygen cylinder duration calculator for ambulatory patients and technicians. (iPhone/iPad app by Responsive Respiratory, Inc..) - Source: https://appshunter.io/ios/app/cyl-duration/id447311122 (this page in markdown: same URL + `.md`) - Developer: [Responsive Respiratory, Inc.](https://appshunter.io/developer/447311125) - Category: Medical, Reference - Price: Free - Rating: 4.50/5 from 8 App Store ratings · 12 written reviews indexed - Age rating: 12+ - Requires: iOS 10.0 · 17 MB - Languages: American English - Released: 2011-07-05 - Data updated: 2026-06-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/cyl-duration/id447311122/reviews.md ## What is Cyl Duration? The O2 To Go! Cylinder Duration App puts patient and technician's minds at ease. With just the touch of a button, the Cyl Duration App calculates the amount of oxygen remaining (hours/minutes) in a cylinder, giving ambulatory users assurance and peace of mind that they have enough oxygen to be on the go. The O2 To Go! Cylinder Duration App enables users to input settings for a precise readout - including device, liter flow, cylinder size and amount of oxygen remaining in the cylinder. Developed by Responsive Respiratory Inc, the High Pressure Oxygen Experts. ## Key features - Calculate remaining oxygen hours/minutes - Input device settings - Input liter flow - Input cylinder size - Precise readout ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/cyl-duration/id447311122/reviews.md ### 5/5 — Amazing!!! *2026-03-05* This app is incredibly helpful for me and my patients. I am a medical equipment technician and set up a lot of people on home oxygen. I refer to this app almost daily as it helps me learn the duration of the tanks based of liter flow and tank size!!! ### 5/5 — Works Great *2021-09-24* Prefect for our needs ### 5/5 — Great!! *2018-06-21* Working for a healthcare provider, this saves me so much time! Great app! ### 1/5 — FIX IT PLEASE *2014-12-18* I am in the dme business and have a need for this on a daily basis. It is not working. ### 1/5 — Used to love *2014-12-01* Used to love this app until the new update. It no longer works!! Please update!! It was my go to app for work! ### 1/5 — Formerly Great App *2014-11-10* This app used to be perfect for setting patients up on oxygen. Since the updates with Apple it no longer works. Please update your app. ### 1/5 — Fix the App!!! *2014-11-03* This app freezes upon opening, please fix and I will change my rating. ### 1/5 — Update *2014-10-16* New version needs to be compatible with new update...won't open, ugh!!! ### 3/5 — Good app *2014-09-26* Would rate this app a five star if after the newest update on iPhone, the app would actually open up. It just freezes up. Please fix?! ### 5/5 — Great app! *2013-03-23* Not sure why there aren't more reviews on this app. For healthcare providers it is awesome to have a quick reference like this. And it's free! I will be recommending all my employees download it. ## Frequently asked questions about Cyl Duration ### How does Cyl Duration calculate oxygen remaining? Cyl Duration calculates remaining oxygen by allowing users to input specific settings such as the device, liter flow, and cylinder size. It then provides a precise readout of the remaining oxygen in hours and minutes. ### What devices does Cyl Duration support? Cyl Duration is available for iPhone, iPad, and iPod devices. It is designed for ambulatory users who need to monitor their oxygen supply on the go. ### Is Cyl Duration free to use? Yes, Cyl Duration is completely free to download and use. There are no in-app purchases or advertisements within the application. ### How often is Cyl Duration updated? The latest version of Cyl Duration, 2.1, was released on June 25, 2019. While updates may not be frequent, the app is developed by Responsive Respiratory Inc., experts in high-pressure oxygen. ### What is the age rating for Cyl Duration? Cyl Duration has an age rating of 12+. This indicates it is suitable for users aged 12 and older, providing a straightforward tool for managing oxygen cylinder duration. ### Can Cyl Duration be used offline? The description does not specify offline functionality, but as a calculation tool, it is likely designed to work without an active internet connection once installed. ### What do users like about Cyl Duration? Based on its 4.5-star rating from 8 reviews, users likely appreciate the app's simplicity and its ability to provide peace of mind by accurately calculating remaining oxygen. ## Version history (last 3 releases) ### 2.1 — 2019-06-25 The UI enhancements. ### 2.0.1.0 — 2015-01-15 1. UI Improvement. 2. Performance improvement. ### 1.0.4.0 — 2011-07-05 No release notes. ## Apps similar to Cyl Duration | App | Rating | Price | Category | | --- | --- | --- | --- | | [MyPreemie app](https://appshunter.io/ios/app/mypreemie-app/id931150109) | 3.5 (59) | Free | Medical | | [AHBenefits](https://appshunter.io/ios/app/ahbenefits/id6692615891) | — | Free | Medical | | [Ventilator Mode Map](https://appshunter.io/ios/app/ventilator-mode-map/id1508307955) | 4.8 (8) | Free | Medical | | [Rapid Vent Calculator](https://appshunter.io/ios/app/rapid-vent-calculator/id6451494244) | 5.0 (36) | Free | Medical | | [ZOLL emsCharts NOW](https://appshunter.io/ios/app/zoll-emscharts-now/id6443943172) | 4.7 (29) | Free | Medical | | [Mosby's PDQ Respiratory Care](https://appshunter.io/ios/app/mosbys-pdq-respiratory-care/id1508972122) | 4.6 (53) | Free | Medical | ## Related topics [cyl](https://appshunter.io/ios/topics/cyl) · [o2 to go](https://appshunter.io/ios/topics/o2-to-go) · [cyl duration](https://appshunter.io/ios/topics/cyl-duration) · [02 to go](https://appshunter.io/ios/topics/02-to-go) · [cylinder duration](https://appshunter.io/ios/topics/cylinder-duration) · [o2togo](https://appshunter.io/ios/topics/o2togo) · [oxmotive](https://appshunter.io/ios/topics/oxmotive) · [durate](https://appshunter.io/ios/topics/durate) · [wellue o2 ring](https://appshunter.io/ios/topics/wellue-o2-ring) · [pneumaticrampt](https://appshunter.io/ios/topics/pneumaticrampt) · [super oxygen](https://appshunter.io/ios/topics/super-oxygen) · [cylinders](https://appshunter.io/ios/topics/cylinders) · [durrat](https://appshunter.io/ios/topics/durrat) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*