DiveCore vs Fathom Dive Planner

DiveCore — A real dive computer for Apple Watch Ultra DiveCore harnesses your Apple Watch Ultra's water-resistant depth sensor, compass, and accelerometer to give divers everything they need right on their wrist. It pairs with the iPhone companion app in real time and uses on-device AI to help you improve your dive patterns. [ Core Features ] Dive Computer (Apple Watch Ultra) - Bühlmann ZHL-16C with adjustable Gradient Factors - Real-time 16-tissue compartment decompression model - No-decompression limit (NDL) and decompression ceiling - Automatic safety stop countdown (3 min @ 3-6 m) - Ascent rate alarm + haptic warnings - PPO2 oxygen limit alarm - Auto water lock - HealthKit workout session integration - 30Hz smooth digital compass Freediving Mode - Depth disciplines (CWT / CWTB / FIM), static apnea (STA), dynamic apnea (DYN / DNF) - Automatic dive detection for depth, manual timer with lap entry for pool disciplines - Dive count, max depth, surface interval, heart rate, and a per-session log - A session spans many dives: surfacing starts the rest timer, and you end the session yourself - Freedive mode runs no decompression model and no gas or NDL alarms - It cannot detect shallow-water blackout. Never freedive alone, and always dive with direct, trained supervision Estimated Dive Route - Surface GPS captured at entry and exit - Underwater path estimated from compass + gyro + accelerometer + depth changes - End-of-dive drift correction using exit GPS - 3D visualization on iPhone (depth profile walls, drag-to-rotate, pinch-to-zoom) - Insights: average speed, activity level, exploration pattern, current drift estimation This is not real underwater GPS tracking. It is a sensor-fusion estimate based on the diver's magnetic heading and motion, with both endpoints corrected by surface GPS fixes. No-Fly Timer (Live Activity) - DAN/UHMS guideline tiers (12h single no-deco / 18h repetitive or multi-day / 24h decompression), never shortened by a later dive - Lock-screen + Dynamic Island countdown AI Analysis (XAI — Explainable) - 100% on-device, no external API calls - Dive score (0-100) with breakdown (Safety, Efficiency, Consistency, Condition, Depth Management) - Real-time Risk Index and automatic stress zone detection - Personal baseline learning Dive Log + Share - iCloud automatic sync across devices - Auto-recorded: water temp, gas mix, SAC, tank pressure, algorithm, no-fly time - Infographic share card, 1080x1350 - Entry/exit coordinates open in Apple Maps DiveCore Studio (Photo Editor) - Underwater color correction, depth-based red channel restoration, AI dehaze - Dive log watermark Watch Display Customization - Technical bottom bar: choose what it shows, including heading (HDG) - Minimal: 3 configurable bottom-card slots and MAX ring field selection iPhone Companion - Detailed dive log with depth profile chart - PADI RDP dive planner, AI report, dive site location, statistics, iCloud backup [ Required Hardware ] - Apple Watch Ultra (1st generation or later) - iPhone with iOS 18+ - iCloud account + Apple Sign-In [ Accessibility ] - VoiceOver support and Dynamic Type - 14 languages [ Subscription Terms ] - DiveCore Pro (choose one; all unlock the full feature set): - Yearly: $29.99/year (KRW 44,000) - includes a 7-day free trial for new subscribers - Monthly: $4.99/month (KRW 7,700) - no free trial - 1-Day Pass: $2.99 (KRW 3,300) - 24-hour access, non-renewing (does not auto-renew) - Local currency may apply; prices are set per storefront. - Payment is charged to your Apple ID account at confirmation of purchase - Yearly and Monthly auto-renew unless cancelled at least 24 hours before the end of the current period - If not cancelled at least 24 hours before the trial ends, you will be charged automatically - Manage or cancel your subscription anytime in your device's App Store account settings - Terms of Use (EULA): https://furyus.dev/terms

Fathom is a native iPhone and iPad app for dive planning and logging. Build open- and closed-circuit decompression schedules with configurable gradient factors, then record every dive you make in the built-in logbook, and link each logged dive back to the plan that produced it. Build single- or multi-level dive plans, manage your gas mixes and tanks, and review every parameter that goes into your decompression schedule before you get in the water. After the dive, capture depth, time, gases, tanks, buddies, locations, and tags in a logbook designed for the same workflow. PLANNING • Configurable gradient factors (default GF 20/85) • Multi-level dive plans with automatic gas selection • Full trimix and heliox support, in addition to air and nitrox • Closed-circuit rebreather plans: fixed setpoints with a switch depth, and travel diluent for deep dives • Open-circuit bailout schedules computed from the worst point of the dive • Repetitive dives: tissue loading, CNS, and OTU carry across surface intervals • Custom gas mixes and standard preset catalogue • Tank and cylinder tracking with SAC and per-tank gas usage • Minimum gas (rock-bottom) reserve required to bring you and your buddy back from depth • NDL (no-decompression limit) at any depth • MOD, END, and gas density for every level, with warnings when a mix gets too dense • CNS clock and OTU oxygen exposure tracking LOGBOOK • Log every dive with depth, time, gases, tanks, location, buddies, and tags • Link each logged dive to its original plan • Browse and search your dive history GENERAL • Metric and imperial units throughout • iCloud sync across your iPhone, iPad, and Mac • One purchase unlocks Fathom on iPhone, iPad, and Mac IMPORTANT Fathom is a planning tool, not a substitute for diver training, qualified instruction, or the judgment of a certified dive professional. Always follow the procedures taught in your training agency, the limits of your certification, and your own dive computer. Decompression diving carries inherent risks. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/