Enhance Your Diving Experience with Advanced Dive Analysis
Experience the most comprehensive dive logging and analysis for iOS and watchOS. Detailed dive tracking, post-dive analysis, and comprehensive analytics to enhance your diving experience.
Compatible with iOS 17.6+, watchOS 10.6+, and optimized for Apple Watch Ultra, Ultra 2, and Series 4+.
Important Notice: Apple Watch Depth Sensor Capabilities & API Information
ZDIVE is fully equipped with advanced dive calculations, including real-time depth tracking, Bühlmann decompression algorithms, and dive safety monitoring. Under Apple's current public APIs, live depth readings are limited to 6 meters (20 feet) during water immersion. However, the Apple Watch hardware records full depth data (up to 40 meters) and water temperature throughout the entire dive into Apple HealthKit. Once surfaced, full dive telemetry and profiles are synchronized into ZDIVE. Full 40-meter real-time support is pending Apple's entitlement approval. Always dive with a certified primary dive computer.
Powerful Features
Everything you need for safe, informed, and analytical diving:
- Water Submersion Detection: Automatic dive start and stop with Apple watchOS 10.6+ water detection technology, with manual controls available.
- Real-time Decompression: Professional-grade Bühlmann ZH-L16C, VPM-B, and RGBM algorithms tracking 16 tissue compartments with configurable conservatism.
- Comprehensive Sensors: Continuous tracking of depth, temperature, heart rate, blood oxygen (SpO2), compass heading, and ambient pressure.
- CloudKit Sync: Seamless automatic synchronization across your iPhone and iPad with conflict resolution and backup.
- GPS Route Tracking: Record dive entry and exit coordinates with GPS breadcrumbs every 30 seconds.
- Live Activities & Dynamic Island: Monitor tissue loading, surface intervals, and no-fly countdown right from your iPhone Lock Screen.
Your Ultimate Dive Companion - Apple Watch & Ultra
Your Apple Watch becomes a reliable dive companion with dedicated modes:
- Scuba Mode: Decompression computer with real-time NDL, safety stops, and ascent rate monitoring.
- Snorkeling Mode: Surface-to-depth cycle tracking with automatic sub-dive detection.
- Digital Crown Control: Navigate dive modes smoothly with the Digital Crown even when wearing dive gloves.
- Water Lock Integration: Automatic water lock activation on immersion with crown rotation exit.
- Apple Watch Ultra Optimized: Built for WR100 rating, -20°C to 55°C operating temperatures, and EN13319 scuba standard gauge support.
iOS Companion App
Powerful post-dive analytics and dive planning tools on iPhone and iPad:
- Comprehensive Dive Details: Interactive dive profile charts, GPS route mapping, and temperature visualization.
- Analytics Dashboard: Period comparisons, depth and duration trends, personal records, and AI-driven insights.
- Tissue Loading Monitor: Real-time Bühlmann ZH-L16C 16-compartment saturation tracking and no-fly countdown.
- Import & Export System: Apple HealthKit workout sync, JSON data backup, and cross-device synchronization.
Professional Dive Planning Suite
Advanced pre-dive calculation tools based on established diving science:
- Multi-Day Trip Planner: Plan dive vacations with day-by-day sequencing, surface interval calculators, and nitrogen loading estimates.
- Gas Planning Calculator: SAC rate calculation, Nitrox (EANx) and Trimix blending, and optimal gas recommendations.
- Buoyancy Calculator: Calculate precise weighting based on wetsuit thickness, tank type, and water salinity.
- Equipment Packing Checklist: 11 categories with over 100 pre-loaded diving essentials.
- Interactive Decompression Tables: Digital tables based on PADI RDP and Bühlmann ZH-L16C models.
Breathing & Apnea Training Exercises
Master your respiratory efficiency and breath-hold endurance with 8 guided techniques:
- Box Breathing (4-4-4-4): Equal timing for inhale, hold, exhale, and hold to reduce stress and stabilize heart rate.
- 4-7-8 Relaxing Breath: Inhale 4s, hold 7s, exhale 8s to calm the nervous system.
- Diaphragmatic Breathing: Deep belly breathing to maximize lung volume and oxygen transfer efficiency.
- Square Freediving: Equal-phase breathing optimized for freedivers prior to descent.
- CO2 Tolerance Tables: Progressive breath-hold tables that condition the body to tolerate hypercapnia.
- O2 Efficiency Tables: Hypoxic training tables to maximize cellular oxygen conservation.
- Wim Hof Method: Power breathing rounds followed by retention to elevate focus and cold tolerance.
- Tactical Breathing: Combat-proven respiratory technique used to maintain composure under pressure.
Safety & Decompression Algorithms
ZDIVE implements the Bühlmann ZH-L16C model with gradient factors, modeling 16 tissue compartments (half-times 4 to 635 minutes) with 6 configurable conservatism levels (Liberal, Moderate, Conservative).
Frequently Asked Questions
- What safety features does ZDIVE include?
- ZDIVE includes configurable safety stops (3-6m @ 3-7 minutes), ascent rate monitoring with visual and haptic warnings, 6 adjustable conservatism levels, real-time NDL tracking, automatic no-fly time calculations, altitude restriction warnings, depth-limit warnings approaching the 40m rated maximum, and remote safety updates.
- How accurate are the decompression calculations?
- Our decompression engine implements the industry-standard Bühlmann ZH-L16C model with gradient factors, tracking 16 tissue compartments with precise half-times and M-values — verified against independently computed reference tables.
- Can I rely on ZDIVE as my primary dive computer?
- ZDIVE is a dive planning, logging, and monitoring instrument — not a replacement for a certified primary dive computer, proper training, or buddy procedures. Always dive with a dedicated, certified primary dive computer and follow its more conservative reading whenever the two disagree.
- How does altitude diving work?
- ZDIVE includes altitude calibration that compensates surface barometric pressure for accurate depth readings at elevation and automatically adjusts decompression calculations and no-fly guidelines.
- What happens if my watch battery dies during a dive?
- ZDIVE writes dive data continuously. If the battery depletes, partial dive data is preserved locally and synchronizes automatically once recharged.
Ready to Dive Deeper?
Download ZDIVE today and elevate your diving experience with advanced logging and analysis.