DIVE TO SURVIVE
GAS GURU v1.7

PLAN IT , TRUST IT, DIVE IT.

DTS Gas Guru is a professional technical diving gas planning app built specifically for technical and CCR divers.
Four precision tools. No guesswork. No spreadsheets. Including Industry Firsts.
Just accurate, reliable calculations — exactly when you need them.

£4.99 · iOS & Android

Get it on Google Play

Download on the App Store

Four Precision
Technical Diving Gas Planning Tools

Every Tool Supports both Open And Closed Circuit

BEST MIX

Calculates the optimal gas mix for any depth based on your desired PO2, Gas density and Narcotic level. Nitrox, Trimix and CCR diluent modes. CCR Diluent defaults align with RESA and ISO standards.

Unique to Gas Guru: Calculates the optimal helium fraction based on your gas density limit and actual water temperature. A level of precision no other app offers.

DTS Gas Guru technical diving gas planning tool Best Mix screen in CCR Diluent mode calculating optimal trimix diluent for 45m depth — PPO₂ limit 1.1, END target 30m, max density 6.3 g/L, water temp 25°C — returning 20% O₂ and 23% He

GAS DENSITY

A real-time gas density calculator with colour-coded Safe / Caution / Critical thresholds for OC and CCR loop gas. Factors in N2, O2 & He.
CCR Diluent limits align with RESA and ISO standards but are user adjustable.

Unique to Gas Guru: Input your actual water temperature for a truly accurate gas density prediction – a world-first feature currently unavailable in any other app.

DTS Gas Guru Gas technical diving gas planning tool Density screen in CCR mode showing loop gas density for a 16/40 diluent at 60m with 1.2 setpoint and 12°C water temperature — result 5.75 g/L, status Safe

GAS CHECK

Check the full properties of any gas mix at any depth — PO₂, EAD, END and
gas density, all instantly displayed.

Unique to Gas Guru: Displays three simultaneous MODs — one for each of your limits: PO₂, gas density and narcotic depth — factoring in water temperature and your O₂ narcosis preference.
Indispensable for CCR divers assessing diluent options.

$DTS Gas Guru technical diving gas planning tool Gas Check screen showing CCR diluent analysis at 60m with 1.1 setpoint — displaying PPO₂, loop gas fractions, END and gas density results simultaneously$

GAS MIXER

Top-up and from-empty gas blending with ideal gas and real gas Z-factor
precision modes taking into consideration filling temperature.

Unique to Gas Guru: Fully adjustable O₂ and Helium purity to account for real-world cylinder supply purity.
Top-up gas is fully configurable — from air to any nitrox or trimix blend for those using banked gasses other than air for blending.