Every dive,
calculated
for you.
Sentinel Dive factors your biometrics — fitness, hydration, health — directly into your decompression calculations. Because two divers at the same depth are never the same risk.
Android APK · Free early access · No account required to explore
Why Sentinel Dive
Your dive computer
doesn't know
how hydrated or fatigued you are.
Standard dive computers track depth and time. Sentinel Dive tracks you. Fatigue, hydration level, cardiovascular fitness, PFO status, and recent dive history all affect how your body absorbs nitrogen. We put those variables where they belong — inside the Bühlmann calculation.
The result: a personalised GF-adjusted risk score, smarter surface interval recommendations, and a decompression profile that reflects your actual physiological state on dive day — not a statistical average diver.
App Screens
See it in action.
Real screenshots from the app — no mockups, no marketing renders.
Your dive day at a glance
Surface interval countdown, tissue desaturation percentage, and hydration tracking — all on your home screen before you even put on a wetsuit.
Bühlmann + your biometrics
Real-time gradient factor adjusted for your physiology. See all 16 tissue compartments and exactly which one is your leading tissue.
Know your numbers before you descend
Plan any dive profile — square, multi-level, or bounce. See PO₂, CNS%, OTU, and your personalised risk score before you hit the water.
Every dive, beautifully logged
Dives grouped by trip, with inline depth profile thumbnails, GF values, max depth, duration, and water temperature in one scrollable list.
Full profile with ceiling overlay
Scrub through the depth curve, see the deco ceiling as a red overlay, and identify the exact moment of any ascent violation.
Ask anything about your dives
"Do you see any DCS risk in my log?" — the AI reads your actual dive history and gives specific, data-backed answers, not generic advice.
All your sites on one map
Search any location and see every dive site in the area. Filter by depth, conditions, or your own logged dives. Works fully offline.
Platform Features
Built for how divers actually dive.
From morning briefing to post-dive debrief, every feature is designed around diver safety and the physiology your dive computer ignores.
Personalised Risk Score
Bühlmann ZH-L16C tissue loading combined with 11 biometric factors — hydration, fitness, PFO status, smoking, and more — produces a risk score specific to you, right now.
Import from Dive Computers
Auto-import dive profiles via Bluetooth or USB from Suunto, Garmin, Shearwater, and more. Full depth profiles, gas mixes, CNS%, and tissue loading — all parsed automatically.
Pre-Dive Briefing
Before every dive, review your personalised risk score for the planned profile, gas mix estimate, PO₂, CNS%, OTU, and minimum surface interval — all on one screen.
Surface Interval Calculator
Surface interval recommendations account for your actual tissue loading from completed dives plus your current hydration level — not a generic table.
AI Dive Assistant
Ask natural questions about your logbook: "Do you see DCS risk in my history?" or "What is my average depth trend?" The AI reads your actual data, not a generic answer.
Maps & Dive Sites
Global dive site database with depth charts, entry points, and marine conditions. Pin your own sites, navigate offline, and see where all your logged dives are on one map.
Logbook & Trip Management
Group dives into trips, view depth profile charts with ceiling overlays, track GF values across multi-dive days, and export to CSV or share PDF dive cards.
Post-Dive Debriefing
After every dive day, log a structured interview — fatigue, joint pain, neurological symptoms, ear equalization — and track symptom patterns over time alongside your tissue loading.
Hydration Engine
Daily hydration targets adjusted for your weight, the number of dives planned, water temperature, and heat exposure. Track intake glass-by-glass and see if you will be ready by dive time.
A Typical Day
Sentinel Dive from
morning to evening.
The app works alongside you through the entire dive day — not just when underwater.
Check your day
The Dashboard shows your planned dives, tissue desaturation from yesterday, hydration status, and marine conditions. It tells you exactly what time to start drinking to be ready by dive time.
Run the briefing
Open Pre-Dive Briefing, enter your planned depth and time. Review your personalised risk score, gas mix estimate, PO₂ and CNS%, minimum no-deco time, and any risk flags — all before you gear up.
Know when you're ready
After Dive 1, the app calculates your minimum surface interval before Dive 2 — accounting for actual tissue loading from that specific dive plus your current hydration level.
Updated for your real state
Your Dive 2 risk score is calculated from where your tissues actually are after Dive 1 — not a generic table. The app reminds you to drink water and flags any new concerns.
Debrief & log
Import your dives from your dive computer. Review the profile chart with deco ceiling overlay. Run the post-dive interview — fatigue, joint symptoms, ear equalisation — and AI analyses your day.
Start diving smarter.
Free early access. Available now for Android. Web platform open for sign-up.
Coming soon to Google Play · iOS roadmap in progress