O2 Duration vs TeleCloud Pro
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.
TeleCloud Pro
This soft client extends your office phone system to your mobile device. Make and receive calls as if you were at your desk, and enjoy free app-to-app calls with other users. Access voicemails, view call history, and manage your greeting.
- Make/receive office calls on mobile
- Free app-to-app calls
- View voicemails
- Access call history
- Change greeting remotely
- High-definition conversations
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TeleCloud PRO is a soft client that extends the TeleCloud Phone System to your cell phone. It allows you to make calls from your cell phone as if you were calling from the office and receive calls. You can make free app to app calls between app users. It gives you the ability to see your voicemails and your call history. It also lets you change your greeting whenever you want. Aside from the typical functionalities, we are thrilled to introduce our complimentary VOIP application which allows crystal-clear, free calls between applications. Enjoy high-definition conversations and secure chats—all provided at no charge!
Screenshots
Verdict
The clearest difference is price: TeleCloud Pro at Free against O2 Duration's $2.99. TeleCloud Pro also leads on rating (4.3 vs 1.0) and update cadence (every 3 months vs every 15 months). O2 Duration's advantage is iOS requirement (7.0 vs 16.0). On 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
TeleCloud Pro is free to download; O2 Duration costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TeleCloud Pro holds the better App Store score, 4.3 against 1.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
O2 Duration ships an update every 15 months, TeleCloud Pro every 3 months. The most recent releases landed on September 30, 2026 and September 23, 2026 respectively.
| Parameter | O2 Duration | TeleCloud Pro |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (1 ratings) | 4.3 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 15 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 7.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 114 MB |
| Age rating | 4+ | 17+ |
| Developer | Advanced Aviation LLC | TeleCloud LLC (NJ) |
Customer experience
O2 Duration
TeleCloud Pro
In-app purchases
O2 Duration
No in-app purchases
TeleCloud Pro
No in-app purchases
Questions
Is O2 Duration free?
Is TeleCloud Pro free?
Which has better reviews, O2 Duration or TeleCloud Pro?
Do O2 Duration or TeleCloud Pro have ads?
Which is updated more often, O2 Duration or TeleCloud Pro?
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