Comparison

Oxygen Cylinder Autonomy Calc vs Nitrox Virtual Analyzer

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

Head to head
About

Oxygen Cylinder Autonomy Calc

Features
Read full description

Must-have App for first aid staff and submarine divers. Calculates the autonomy of the oxygen cylinder and the air cylinder. The first aid personnel will be able to calculate the autonomy of a cylinder of oxygen through the knowledge of its capacity and oxygen supply applied to the patient. Diving enthusiasts will finally be able to easily: - CALCULATE THE LITERS OF YOUR TANK - CALCULATE AIR CONSUMPTION IN A SPECIFIC DEPTH - CALCULATE THE AUTONOMY OF YOUR TANK There is also an All In One section where you will be guided step by step through the entire calculation of your dive, following the order you will find out how many minutes of diving you will have.

About

Nitrox Virtual Analyzer

Features
Read full description

Our Nitrox Virtual Analyzer is the first of its kind in the world. It gives you the ability to safely and conveniently learn how to operate a Nitrox Analyzer, used for scuba diving. Without having to visit a dive center to borrow and analyzer and cylinder of Nitrox or go to the expense of purchasing an analyzer & Nitrox cylinder. The app allows you to make mistakes in safety, and let the app guide you through the correct way to calibrate and analyze a Nitrox gas mix. The app has been written by experienced diving instructors, and closely resembles a real Nitrox Analyzer in both its look, operation, and response. So when you actually use a real Nitrox analyzer you will be familiar with its use. This app gives you the ONLY way to get certified by any diving agency for Nitrox without attending a class! A requirement for most Nitrox courses is to analyze a Nitrox mix, to obtain certification; if you haven't done that you should consult your instructor/dive center if you have correctly fulfilled the requirements of your course. NOTE: This app is for simulation purposes only, it CAN NOT actually measure the oxygen percentage in a gas. There is no Oxygen sensor in your mobile device!

Screenshots

Oxygen Cylinder Autonomy Calc4 screens
Nitrox Virtual Analyzer4 screens

Verdict

The call

The clearest difference is update cadence: Oxygen Cylinder Autonomy Calc at every 2 months against Nitrox Virtual Analyzer's every 24 months. Oxygen Cylinder Autonomy Calc also leads on iOS requirement (9.2 vs 13.0). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Oxygen Cylinder Autonomy Calc ships an update every 2 months, Nitrox Virtual Analyzer every 24 months. The most recent releases landed on September 13, 2026 and May 19, 2026 respectively.

Scorecard2 real differences · 4 level
Oxygen Cylinder Autonomy Calc versus Nitrox Virtual Analyzer: the parameters behind the verdict, then further details
ParameterOxygen Cylinder Autonomy CalcNitrox Virtual Analyzer
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 24 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.2 — better13.0
Further details — not scored
Size16 MB6 MB
Age rating4+4+
DeveloperDIGITAL IDEATORS INNOVATIONS SRLJames Costello

In-app purchases

None

Oxygen Cylinder Autonomy Calc

No in-app purchases

None

Nitrox Virtual Analyzer

No in-app purchases

Questions

Is Oxygen Cylinder Autonomy Calc free?
Oxygen Cylinder Autonomy Calc is free to download, with no in-app purchases.
Is Nitrox Virtual Analyzer free?
Nitrox Virtual Analyzer is free to download, with no in-app purchases.
Do Oxygen Cylinder Autonomy Calc or Nitrox Virtual Analyzer have ads?
Neither Oxygen Cylinder Autonomy Calc nor Nitrox Virtual Analyzer shows ads.
Which is updated more often, Oxygen Cylinder Autonomy Calc or Nitrox Virtual Analyzer?
Oxygen Cylinder Autonomy Calc ships an update every 2 months, and Nitrox Virtual Analyzer every 24 months. Most recently, Oxygen Cylinder Autonomy Calc was updated on September 13, 2026 and Nitrox Virtual Analyzer on May 19, 2026.

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