Gas Guru
Plan It. Trust It. Dive It.
Professional Gas Planning. In Your Pocket.
DTS Gas Guru is a professional gas planning app built specifically for technical and CCR divers. Four precision tools. No guesswork. No spreadsheets. Just accurate, reliable calculations — exactly when you need them.
Four Precision Tools
Every tool supports both Open Circuit and CCR modes.
Best Mix
Calculates the optimal gas for any target depth. Nitrox, Trimix and CCR diluent modes with END targeting.
Calculates the optimal helium fraction based on your gas density limit and actual water temperature — warmer water requires less helium, colder water more. A level of precision no other app offers.
Gas Checker
Check the full properties of any gas mix at any depth — PO₂, EAD, END and gas density, all instantly displayed.
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.
Gas Density World First
Real-time density calculator with colour-coded Safe / Caution / Critical thresholds for OC and CCR loop gas.
Input your actual water temperature for a truly accurate gas density prediction — a world-first feature unavailable in any other app.
Gas Mixer
Top-up and from-empty blending with ideal gas and real gas Z-factor precision modes.
Adjustable O₂ purity to account for real-world cylinder purity. Top-up gas is fully configurable — from air to any nitrox or trimix blend.
Built For
CCR Divers
Setpoint-aware calculations for diluent analysis, MOD and density.
Tech OC Divers
Trimix and Nitrox planning with real gas precision.
Dive Instructors
Show students exactly why gas choices matter.
Gas Blenders
O₂ purity adjustment and Z-factor precision blending.
Get DTS Gas Guru
Available now on iOS and Android · £4.99 · No subscription · No data collected