ZDive vs Rubelis

ZDive transforms your Apple Watch into a smart dive companion with comprehensive iOS analytics. Whether you're snorkeling in tropical waters or logging recreational scuba dives, ZDive provides the tools you need for safe and memorable underwater adventures. APPLE WATCH — YOUR DIVE COMPANION Real-time dive tracking with automatic water submersion detection on Apple Watch Ultra (manual controls on other models) Rich sensor integration: depth, temperature, heart rate, compass, ambient pressure Scuba and snorkeling modes with Digital Crown navigation Industry-standard Bühlmann ZH-L16C decompression algorithm — the same model used by leading dive computers Real-time NDL calculations and safety stop monitoring Dive simulation mode: practice with realistic training scenarios Crash-safe recording: in-progress dives are checkpointed and automatically recovered GPS route tracking with breadcrumb trails Altitude diving support with automatic calibration Note: due to Apple's current API restrictions, live depth readings on Apple Watch are limited to about 6 meters. Deeper dives recorded with Apple's Depth app can be imported via HealthKit for full analysis. iOS APP — ADVANCED ANALYTICS & PLANNING Beautiful dive trends dashboard with period comparisons and personal records Interactive dive profile charts and sensor data visualization Diver profile with certifications and emergency contacts Import historical dives from Apple Health — duplicates are detected automatically Export dives in JSON and UDDF formats for other dive log software COMPREHENSIVE DIVE PLANNING SUITE Multi-Day Trip Planner with surface interval calculations Gas Planning Calculator: SAC rates, Nitrox optimizer, and a Trimix reference calculator Equipment Packing Lists with pre-built templates No-Decompression Planner with altitude compensation Interactive Decompression Tables: Bühlmann and PADI RDP PROFESSIONAL BREATHING TRAINER 10 breathing techniques: box breathing, 4-7-8, diaphragmatic Freediving-specific CO2 and O2 tolerance tables Wim Hof Method and tactical breathing patterns LIVE ACTIVITIES & WIDGETS Real-time tissue loading on Lock Screen and Dynamic Island No-fly time countdowns with maximum altitude restrictions Surface interval tracking between dives SAFETY & RELIABILITY 16-compartment tissue tracking with 6 conservatism levels Configurable safety stops (3–6 m depth, 3–7 minutes) Ascent rate monitoring with visual and haptic warnings Sensor data validation to filter spikes and false readings Automatic CloudKit backup and sync across devices Offline functionality with background synchronization SEAMLESS DATA MANAGEMENT Fast Watch-to-iPhone sync with optimized compression HealthKit integration for comprehensive health tracking Manual and automatic sync options with bulk import/export Try it instantly with a built-in demo dive — no gear required MULTI-LANGUAGE SUPPORT Available in English, Turkish, Chinese (Simplified), Russian, Spanish, Portuguese, Japanese, Arabic, French, Hindi, Bengali SUPPORTED DEVICES Apple Watch running watchOS 10.6 or later (Series 6 and later, SE, and Ultra) Apple Watch Ultra recommended: automatic submersion detection and enhanced diving sensors iPhone with iOS 17.6 or later, full iPad support for planning and analysis ZDive is free to use and supported by ads. Whether you're exploring coral reefs on a snorkel or logging recreational scuba dives, ZDive provides professional-grade planning and analysis tools in an intuitive interface. Note: ZDive is intended for recreational use as a dive companion and tracker, not as a certified dive computer. Always dive with certified diving equipment and follow proper safety protocols. Never rely solely on consumer devices for critical diving decisions. Join ZDive to enhance your underwater adventures. Dive deeper, plan smarter, and explore safely with ZDive.

Rubelis is a scuba dive log for divers who want more than a list of depths and times. Log a dive in seconds or import it from Suunto, add your underwater photos, ask Rubelis AI about your diving, get dives signed off by your instructor and share any dive as a beautiful story card. YOUR DIVE LOG Record site, location, depth, duration, gas, cylinder, conditions, buddy and notes. See your total dives, time underwater and deepest dive at a glance. UNDERWATER PHOTOS Add up to 12 photos from your library or camera to each dive. Photos stay on your phone. SHARE YOUR DIVE AS A STORY Turn any dive into a 1080×1920 Instagram-ready card: choose a photo as the background and Rubelis lays out site, date, depth, time and tank on top. Show or hide your note, and add an "Instructor verified" badge when the dive has a valid instructor approval. Save it as a JPEG or share it directly. SUUNTO IMPORT Connect your Suunto account and import eligible dives synced through Suunto App, including Suunto Ocean, D5, EON Steel, EON Steel Black, EON Core and other compatible Suunto dive computers. New dives can arrive automatically. ASK RUBELIS (AI) Analyse your last dive, plan the next one, explore patterns across your log or have a diving concept explained. Rubelis AI includes a fair-use allowance of 50 successful responses per calendar month. INSIGHTS Measured observations from your own log: deepest and average depths, durations and recurring patterns, clearly labelled as facts or patterns, without scores or rankings. INSTRUCTOR APPROVAL AND GROUP DIVES Send a dive to your instructor for approval and keep the approval with the record. Instructors and dive leaders can create Group Dives, share them by QR or join code and approve their divers' dives. INSTRUCTOR ACCOUNTS ARE FREE Instructor accounts are free and are for creating Group Dives and approving divers' dives. The dive log and AI analysis are part of the Diver account, so whatever your certification level, sign up as a Diver to use every feature. PDF RECORDS Export selected dives as a clean PDF, including professional approval where available. ENGLISH AND TURKISH Switch language on any screen. SUBSCRIPTION The Diver dive log and Rubelis AI require a Rubelis subscription (monthly or annual), purchased through Apple In-App Purchase. Eligible new subscribers start with a 7-day free trial: nothing is charged today, and the subscription renews automatically at the price shown in the app unless cancelled at least 24 hours before the trial or period ends. Manage or cancel any time in your App Store account settings. Rubelis is not a dive computer, medical device, emergency service or a substitute for formal training, certification standards, professional instruction or dive planning. Always dive within your training and experience. Privacy Policy: https://rubelis.com/app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/