O2 Duration vs Clinical Protocols
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O2 Duration
Calculate the approximate remaining oxygen in portable cylinders. Select your tank size, input current pressure and desired flow rate to see duration in minutes. Features a timer with alerts for low pressure.
- Oxygen cylinder duration calculation
- Supports multiple cylinder sizes (A, B, D, E, G, H, K, M)
- Input current tank pressure
- Input desired flow rate
- Displays duration in minutes
- Running timer with remaining time
- Low pressure alerts (500lbs and 0lbs)
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O2 Duration is an oxygen consumption calculator for various oxygen cylinder sizes. This is the easiest way to quickly determine the approximate number of minutes until an oxygen tank will be depleted of oxygen. This tool is a must have for Nurse's and EMT’s who work with portable oxygen cylinders. The application allows you to select cylinder tank sizes A, B, D E, G, H, K and M. With the current tank pressure and desired flow rate, the app will display the oxygen duration in minutes. Additionally, a timer can be started which will display a running tank pressure and time in minutes remaining until the tank is empty. When tank pressure reaches 500lbs or when the tank pressure is zero the application will alert you. This is not a substitute for looking at the oxygen cylinder gauge to determine actual pressure and should not be relied on as a means to determine oxygen remaining.
Clinical Protocols
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The Clinical Protocols App is designed to support Michigan Medicine staff, faculty and medical staff, residents and fellows, medical, nursing, and associated health students. It contains helpful clinical resources to support care at the bedside. All eligible individuals are invited to download it, become familiar with it, and use as needed. We hope you find it helpful, and welcome your suggestions for improvement and for additional tools to be added in the future.
Screenshots
Verdict
The clearest difference is price: Clinical Protocols at Free against O2 Duration's $2.99. O2 Duration's advantage is iOS requirement (7.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Clinical Protocols is free to download; O2 Duration costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
O2 Duration ships an update every 15 months, Clinical Protocols every 18 months. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.
| Parameter | O2 Duration | Clinical Protocols |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 15 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Advanced Aviation LLC | Tactuum, LLC |
In-app purchases
O2 Duration
No in-app purchases
Clinical Protocols
No in-app purchases
Questions
Is O2 Duration free?
Is Clinical Protocols free?
Do O2 Duration or Clinical Protocols have ads?
Which is updated more often, O2 Duration or Clinical Protocols?
Other comparisons
