Dive Shearwater vs DecoPlan

The world is your dive log. Built for simplicity and reliability, Dive Shearwater gives you the tools you need now and the foundation for even more powerful features in the future. More than just another dive log - With an improved user flow and streamlined experience, Dive Shearwater feels intuitive and easy to use. Keep your records organized and focus on the details that matter most to every diver. Track your adventures - Use the interactive dive maps to build your own personal guide of the places you’ve explored. Automatically capture dive site coordinates with the new Swift GPS transmitter on any air integrated Shearwater computer. Whether you're marking new dive sites, refining your gear setup, or simply keeping your dive history pristine, Dive Shearwater delivers a seamless, intuitive experience tailored for divers of all skill levels who value precision and adventure. Together, Shearwater dive computers and the Dive Shearwater app form a complete ecosystem—delivering precision in the water and clarity on land. Dive Shearwater builds on our core principles of being powerful, simple and reliable, while giving you the dive tools you need to track, reflect, and plan your next adventure with confidence.

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)