Simple to use Nitrox calculator which can determine your maximum operating depth (using PO2 of 1.4) and your contingency operating depth (using PO2 of 1.6) for a given Nitrox blend (FO2). Has the ability to pick "best mix" for a given expected maximum depth and once a blend has been chosen can calculate the equivalent air depth and PO2 exposure for a given depth. Added the ability to pick a start mix and a final mix and calculate the blending (ideal gases only) using pure O2 partial pressure blending with air top-up from any mix to mix from air up to 99.9% FO2. Ad free forever.

What’s New

Version 1.8.0

Updated UI for iPhone 6 and iPhone 6+. Removed support for iOS 6 and iOS 7.

Ratings and Reviews

4.0 out of 5
1 Rating
1 Rating
MConner235 ,

Best Nitrox App

This is the best Nitrox app I have found. It’s not perfect, as I wished it held your changes to settings. I dive in fresh water mostly and I have to change from salt water to fresh water each time I launch the app. If the developer could modify the app to hold the changes made to settings, it would be the perfect Nitrox app.


Andrew Forget
1.7 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Copyright (c) 2012-2016, AndyDragon Software. All Rights Reserved.


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