# Gas Manager: Nitrox & Trimix

> Scuba Blender & MOD Calculator

Canonical page: [https://chrome-stats.com/d/id500438406](https://chrome-stats.com/d/id500438406)

## Overview

- **ID:** `id500438406`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Ryan Booker
- **Category:** Utilities
- **Rating:** 4.00 / 5 (2 ratings)
- **Version:** 2026.3
- **Last updated:** 2026-09-12
- **First published:** 2012-02-11
- **Size:** 16 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/gas-manager-nitrox-trimix/id500438406)
- **Privacy policy:** [https://ryanbooker.com/privacy-policy](https://ryanbooker.com/privacy-policy)

## Description

Now native on iPhone, iPad, and Apple Vision Pro.  

Operating Limits shows density and EADD (Equivalent Air Density Depth) alongside MOD, END, and EAD.

Gas Manager is a fast, focused toolkit for divers who mix and plan their own breathing gases. Nitrox, trimix, and everything in between.

BLENDING
• Partial Pressure Blending: a step-by-step recipe from your current fill to your target mix, with optional oxygen and helium fudge factors to offset fill heating
• Continuous Blending: the practical recipe for blending with a stick, including the drain-down and the top-off gas
• Top Off: see exactly what mix you end up with when you top a partial fill with air, nitrox, trimix, or oxygen

PLANNING
• Operating Limits: MOD, END, EAD, and EADD for a gas, all on one screen
• Operating Depth Range (MOD): the full usable depth window for a mix, not just the maximum, across your chosen PPO₂ range
• Equivalent Narcotic Depth (END): with an option to treat oxygen as narcotic
• Equivalent Air Depth (EAD): for using nitrox with air tables
• Equivalent Air Density Depth (EADD): gas density in g/L plus the depth at which air would breathe the same, against the 5.2 and 6.2 g/L research limits
• Best Mix: the richest, leanest-helium mix your PPO₂ and END limits allow

BUILT FOR HOW YOU ACTUALLY FILL
• Standard gases one tap away: air, EAN32, EAN50, oxygen, 30/30, 21/35, 18/45, 15/55, 12/65, 10/70, 8/85, 35/25; or dial in any custom mix
• Metric and imperial throughout
• Switch units and other settings whenever you like and everything is converted in place

DESIGNED FOR APPLE PLATFORMS
• Native on iPhone, iPad, and Apple Vision Pro
• Siri and Shortcuts support, plus Home Screen Quick Actions for the primary tools
• Full Dynamic Type, VoiceOver, Dark Mode, and tinted icon support
• English, Spanish, French, German, and Italian
• No account, no ads, no subscription. Buy it once. Tips are optional and always will be.

WARNING
Safe gas blending requires proper training and equipment. Gas Manager is a calculation aid, not a substitute for training. Always personally analyse and label your fills before diving.

## Rankings

- #705,390 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id500438406)