DivyWivy: Gas Calculator is your pocket blending studio for Nitrox and Trimix, with MOD limits, narcotic depth and air consumption in one rugged, zero-latency toolkit.
Explore the toolkitMeet the teamExact bar or psi of oxygen, helium and air to reach your target bottom mix, with partial pressure and continuous blending.
Adjust a part-filled cylinder without emptying it. See precisely what to drain and what to add.
Instant depth alerts from customizable ppO₂ thresholds between 1.2 and 1.6 bar.
Keep your head clear with equivalent narcotic depth and air-equivalent depth for tidy dive planning.
Enter tank pressures and average depth to get your real surface consumption in L/min or cu ft/min.
Rule of Thirds or custom turn pressures for cave and wreck profiles, with total gas volumes worked out.
No signal on the liveaboard? No problem. Every calculation runs on your device.
Flip between Bar/Meters and PSI/Feet in a tap, natively.
🤿 We are a small crew of divers and engineers who got tired of scribbling gas math on slates and wet-notes at the dock.
🎯 Our mission is simple: make precise, safe gas planning feel effortless for recreational, technical and cave divers alike.
🫧 DivyWivy hands you blends, depth limits, narcotic loads and consumption rates in seconds, all offline and ready on any boat.
⚓ Because confident dives start with numbers you can trust. Plan the gas, dive the plan.
Effective Date: September 2026
DivyWivy: Gas Calculator does not collect, store or share any data. Every calculation happens locally on your device.
We collect nothing. The app does not gather personal details, gas mixes, tank pressures, dive profiles, location or device identifiers.
Since no information leaves your device, we have nothing to use. Values you type into the blender, MOD, END, EAD or SAC tools are processed only to show you results on screen.
Any settings, such as your preferred units or ppO₂ limit, remain on your device only. There is no cloud storage and no server on our side.
The app includes no analytics, advertising networks or trackers, and it shares nothing with outside companies.
Because data never travels over a network, there is nothing to intercept. Your device's own protections keep local data safe.
We do not knowingly collect information from anyone, including children under 13, consistent with COPPA. The app is safe for young divers to use under supervision.
There are no accounts to manage. To remove all locally held app data, simply uninstall the app.
If this policy changes, we will update it on this page and revise the effective date above.
Questions? Write to privacy@divywivygascalculatorapp.com.
👋 Got a question, a blend idea or a bug from the boat? We love hearing from fellow divers, so drop us a line.
⏱️ We reply within 24–48 hours.