Comparison

O2 Duration vs TeleCloud Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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)
Features
Read full description

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.

About

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.

Highlights
  • Make/receive office calls on mobile
  • Free app-to-app calls
  • View voicemails
  • Access call history
  • Change greeting remotely
  • High-definition conversations
Read full description

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

O2 Duration3 screens
TeleCloud Pro4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
O2 Duration versus TeleCloud Pro: the parameters behind the verdict, then further details
ParameterO2 DurationTeleCloud Pro
Price$2.99Free — better
Rating1.0 (1 ratings)4.3 (4 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings14 — better
Update frequencyEvery 15 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS7.0 — better16.0
Further details — not scored
Size1 MB114 MB
Age rating4+17+
DeveloperAdvanced Aviation LLCTeleCloud LLC (NJ)

Customer experience

O2 Duration

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

TeleCloud Pro

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

O2 Duration

No in-app purchases

None

TeleCloud Pro

No in-app purchases

Questions

Is O2 Duration free?
O2 Duration costs $2.99, with no in-app purchases.
Is TeleCloud Pro free?
TeleCloud Pro is free to download, with no in-app purchases.
Which has better reviews, O2 Duration or TeleCloud Pro?
TeleCloud Pro is rated higher. O2 Duration averages 1.0 out of 5 from 1 ratings, while TeleCloud Pro averages 4.3 from 4 ratings.
Do O2 Duration or TeleCloud Pro have ads?
Neither O2 Duration nor TeleCloud Pro shows ads.
Which is updated more often, O2 Duration or TeleCloud Pro?
O2 Duration ships an update every 15 months, and TeleCloud Pro every 3 months. Most recently, O2 Duration was updated on September 30, 2026 and TeleCloud Pro on September 23, 2026.

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