NitroxCalc 4+

Easy Nitrox calculation

frobese GmbH

Designed for iPad

    • 3.5 • 2 Ratings
    • $3.99



The NitroxCalc app is a straightforward tool for Nitrox/Enriched Air divers who want to plan their next underwater trip. They say you should never make rough estimates when diving – so be on the safe side with NitroxCalc!

Doing your calculations by hand are a thing of the past! Our app is ideal for divers who want straightforward operation and fast calculations. With the control via a simple slider, calculations according to the MOD, Best Mix and Blend models can be performed in real time. At any time, you can switch between imperial and metric units.

The NitroxCalc app offers you:
- iPad and iPhone version
- MOD calculation (maximum dive depth)
- Best Mix calculation (maximum oxygen percentage at a given target depth)
- Blending calculation
- Imperial and metric units
- CNS display for selected ppO2
- No-decompression time calculation based on DECO2000 table

Maximum depth is 60m (180ft) and maximum O2 percentage is 90%. The filling pressure has a fullness of 0 to 300 bar (0 to 4000 psi).

NitroxCalc does not replace a in-depth dive planning and should be used only after an authorized Nitrox course!

Feel free to contact us with suggestions for improvement and errors via the support address. We have an open ear for our customers and want to develop NitroxCalc further.

What’s New

Version 2.0

The user interface of the app was completely redesigned.

Ratings and Reviews

3.5 out of 5
2 Ratings

2 Ratings

Rmag ,

Too restrictive, kills usefullness

This app is too restrictive. It limits Best Mix dive depth planning to 120 feet. For blend calculations, the max pressure is limited to 3190 psi, precluding higher pressure steel tanks which use 3442 or 3500 psi working pressures.

For a few dollars more, another App called Nitrox Tools is a much better purchase for the following reasons:

NitroxCalc's best Mix is limited to 120 feet. Nitrox Tools does not have this restriction. You can enter in well beyond recreational depths if you want. Nitrox Tools blending calculations are more versatile providing top up and bleed down, without the stupid 3190 psi working pressure limit.

In NitroxCalc, Every time you leave the Best Mix page, it resets the depth to 60 feet. Nitrox keeps all prior inputs even when you exit the app.

Nitrox Tools allows you to enter both your Max PPO2 and Contingency PPO2 and shows you both.

Nitrox tools allows you to email your resultant calculations.

The last dive I went on had a max depth of 130 feet and I used a HP steel cylinder with a 3500 working pressure. This app is completely useless for that simple scenario.

App Privacy

The developer, frobese GmbH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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