Dive Toolbox vs DecoPlan

DiveToolbox — Professional dive planning and gas calculation tools for recreational and technical divers. DECOMPRESSION DIVE PLANNER Plan single-level and multi-level dives using the Bühlmann ZH-L16C algorithm with configurable gradient factors. Get detailed ascent profiles, gas switch schedules, and comprehensive safety analysis including CNS, OTU, gas density, and END monitoring. GAS BLENDING CALCULATOR Step-by-step fill instructions for Nitrox and Trimix blending. Supports partial pressure and continuous flow methods with real-time MOD calculations. MOD / EAD / END CALCULATOR Instantly calculate Maximum Operating Depth, Equivalent Air Depth, and Equivalent Narcotic Depth for any gas mix. GRADIENT FACTORS EXPLORER Visualize how GF Low and GF High affect no-decompression limits and decompression schedules. SAC RATE CALCULATOR Calculate your Surface Air Consumption rate from dive data to improve gas planning accuracy. ROCK BOTTOM CALCULATOR Determine minimum gas reserves for safe ascent, including emergency scenarios with configurable safety margins. SUCCESSIVE DIVE PLANNER Plan repetitive dives accounting for residual nitrogen and helium tissue loading from previous dives. UNIT CONVERSIONS Convert between metric and imperial units for depth, pressure, volume, and temperature. KEY FEATURES • Multi-gas support with automatic deco gas switching • Save and organize dive plans in folders • Save tank presets for quick planning • Share plans via link or QR code • Export plans as PDF • Customizable diver profile (GF, SAC, PPO2, speeds) • Dark and light themes • Available in 7 languages: English, French, German, Spanish, Italian, Polish, Russian Terms of Use: https://divetoolbox.com/en/terms Privacy Policy: https://divetoolbox.com/en/privacy

DecoPlan is a universal dive planner for open-circuit and rebreather (CCR) divers, built around two published decompression models: VPM-B with the critical-volume algorithm and Bühlmann ZHL-16C with gradient factors. NO-DECO PLANNER • No-decompression limits for air and nitrox, safety stop, gas needed • Repetitive dives with surface intervals, altitude and fresh water • NDL table for every mix at a glance TECHNICAL PLANNER • Multi-level profiles, any number of gases (nitrox, trimix, oxygen) • Automatic deco-gas switches by ppO₂, last stop at 3 or 6 m, air breaks on O₂ • Runtime table with ppO₂, END, ceiling; depth profile with the ceiling band • Tissue loading graph, CNS/OTU, gas consumption per cylinder, minimum gas, turn pressure • Model comparison: the same dive through six model settings side by side • Contingency grid: what happens 3/6/9 m deeper or 5/10/15 min longer • Lost-gas scenarios, wet-notes text export REBREATHER (CCR) · PRO • Setpoints for bottom and deco, setpoint switching by depth • Diluent plus up to ten bailout cylinders with their own mixes • Open-circuit bailout: a failure at the turn point (half the bottom time) with the swim back, or at the end of the bottom time • Bailout advisor: how many cylinders, which mixes, switch depths and sizes for the planned depth TOOLS • MOD, END, EAD, gas density, best mix, partial-pressure blending, SAC calculator Six languages: English, Russian, German, Spanish, Simplified and Traditional Chinese. All features, including the Pro feature set (CCR and SCR, VPM-B and VPM-B/GFS, multi-level profiles, more than two deco gases, oxygen breaks, contingency and lost-gas plans, model comparison, team planning, sync between devices), are free for 30 days from download, or from first launch if the download date is unavailable. No in-app purchase or subscription can be bought at this time, and the app contains no advertising. A genuine paid annual subscription continues until the end of the term already paid for, and a lifetime purchase remains valid. Any other access previously granted to an existing account is honored only for the period already granted and does not become unlimited. Existing plans, dive logs, equipment, trips, photos and account data are preserved. IMPORTANT DecoPlan is a planning tool for trained divers. Every decompression model is an approximation; verify plans with another planner and your dive computer, keep gas reserves, and never dive beyond your training. The app is not a medical device and does not guarantee safety. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://decoplan.dvpdnsca.org/privacy.html © 2026 Dmitri Plotnikov (dvp)