Nitrox Helper

Essential Nitrox calculators in 8 languages with 16 beautiful themes. Calculate for sea or lake diving.

Nitrox Helper is a Nitrox calculator designed for qualified EAN divers.

Whether you're at the dive shop deciding on your mix or reviewing calculations before a dive, Nitrox Helper gives you quick, accurate answers with an interface designed for ease of use - even with cold hands.

Your essential dive buddy for Enriched Air Nitrox (EAN) calculations.

FOUR POWERFUL CALCULATORS

Best EAN Mix Calculate the optimal oxygen percentage for your planned depth and PPO limit. Know exactly what mix to ask for at the fill station.

Maximum Operating Depth (MOD) Determine the deepest safe depth for any Nitrox mix. Essential for dive planning and safety.

Equivalent Air Depth (EAD) Convert your Nitrox dive to an equivalent air depth for use with standard Recreational Dive Planner (RDP) tables.

Oxygen Partial Pressure (PPO) Monitor your oxygen partial pressure at any depth. Clear safety indicators warn you when approaching or exceeding safe limits.

SALT WATER & FRESH WATER

Calculate accurately for both environments. Sea water (10.0 m/atm) and fresh water (10.3 m/atm) use different pressure factors - Nitrox Helper accounts for this automatically. A read-only indicator on every calculator tab shows your current water type so you always know what you're calculating for.

8 LANGUAGES

Use the app in your preferred language: English (UK), English (US), Afrikaans, Greek, French, Spanish, German, and Dutch.

PERSONALISE YOUR EXPERIENCE

• 16 beautiful colour themes
• Metric (metres) or Imperial (feet) units
• Configurable decimal places (0-3) for depth and PPO results
• Per-tab unit switching from the toolbar

DESIGNED FOR SAFETY

• Clear PPO safety status indicators (Safe / Caution / Danger)
• Visual warnings when exceeding Maximum Operating Depth
• Read-only water type indicator prevents accidental changes
• Important safety disclaimer on every calculator

PRIVACY FIRST

Your data stays on your device. No tracking, no analytics, no account required, no internet connection needed.

TRY BEFORE YOU SUBSCRIBE

The app has two separate trial mechanisms:

1. Nitrox Helper is free to download with a 30-day in-app trial that gives full access for 30 days.

2. 2-week introductory offer — Available on the Monthly, 6 Monthly, and Annual subscription plans.

Compatible with iPhone and iPad.

The Pro Tier has three subscription options.

Nitrox Helper Pro Monthly at $0.99 a month with a 2-week free trial.

Nitrox Helper Pro 6 Months at $5.99 every 6 months with a 2-week free trial.

Nitrox Helper Pro Annual at $9.99 a year with a 2-week free trial — our best value.

Nitrox Helper Pro Lifetime at $49.99 one-time.

You control your subscriptions through the App Store subscription settings.

DISCLAIMER: This calculator is for discussion purposes only and is not intended for actual dive planning. Always refer to your certifying agency's Enriched Air Diving procedures to plan your dives.

Privacy Policy URL https://solosoftware.app/nitrox-helper/Nitrox_H_Privacy_Policy.html

Your use of Nitrox Helper is governed by Apple's standard Licensed Application End User License Agreement. Terms of Service (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/