RSC Nitrox
Plan enriched-air dives in seconds
RSC Nitrox is a fast, focused Nitrox planner. Dial in your mix and depth and get the four numbers that matter - MOD, Best Mix, EAD and PPO₂ - instantly, offline, in a clean underwater interface.
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Free • Offline • No account, no ads, no tracking
Four calculators, on your wrist and in your pocket
The deepest you can safely take any EANx mix, for your chosen max PPO₂. Drag the O₂ slider and watch the depth update live.
The richest usable Nitrox mix for a target depth - the most O₂ you can breathe without exceeding your PPO₂ limit.
The air-equivalent depth for a Nitrox mix, so you can plan no-deco time straight from your air tables.
Partial pressure of oxygen for a mix at depth, with a clear safe / caution flag against your chosen limit.
An independent watch app carries every calculator on your wrist - spin the Digital Crown to dial your mix, no iPhone needed.
Everything runs on-device. No account, no ads, no tracking, no connection needed - it just works on the boat.
Meters or feet, salt or fresh water - set it once and every calculator follows.
Adjustable max PPO₂ from 1.2 to 1.6 and a max O₂ content cap, so the planner matches your training and agency.
English, Deutsch, Français, Italiano, Español, Українська and Русский - the dive abbreviations stay international.
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RSC Nitrox is a planning aid - accuracy cannot be guaranteed. Always confirm your mix with an analyzer before entering the water, and dive within your training and limits.
Our main app is a full guide to the marine life of the Red Sea - species catalogue, dive sites, centers and more.