High Pressure Planner

High Pressure Planner is a decompression planning tool for certified technical divers. Plan multi-level, multi-gas dives on the Bühlmann ZHL-16 model with gradient factors. Build your dive step by step, choose your gases, and get a complete schedule: decompression stops, gas switches, CNS and OTU oxygen exposure, and per-gas consumption including a lost-gas bailout plan. • Bühlmann ZHL-16 with adjustable gradient factors (plus the ZHL-12 model) • Multi-gas planning: air, nitrox, trimix — switches planned by MOD • Oxygen toxicity tracking (CNS %, OTU) and gas consumption per tank • Bailout planning: simulate losing any gas mid-dive • Tools: MOD, END and best-mix calculators • Share dive plans as files between devices • Your dives stay on your device — no account, no cloud Recreational planning is free. Paid tiers follow certification levels — Advanced Nitrox, Normoxic Trimix, Full Trimix — and are available as monthly or annual auto-renewing subscriptions, each with a 3-day free trial. Prices are shown in the app before purchase. Payment is charged to your Apple Account at confirmation, and the subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel a subscription in your Apple Account settings after purchase. Privacy Policy: https://highpressuregroup.net/high-pressure-planner-privacy-policy/ Terms of Use (EULA): https://highpressuregroup.net/high-pressure-planner-terms-of-use/ This app is a planning aid for trained, certified divers. It does not replace training, dive tables, a dive computer, or your own judgement.