Submarius — Ocean conditions for spearos, divers, and fishermen

Ocean intelligence When conditions are right,you'll know. Submarius is a mobile-first app for spearos, divers, fishermen, and boaters. Real water-clarity forecasts, honest bite scores, and a verdict — not another dashboard — for every activity on the water. Anonymous-first. Safety features permanently free. No auth wall. Water clarity forecast The only app that predicts how far you'll see underwater. Satellite Kd490 turbidity, river-discharge plumes, wave mixing, and post-dive reports feed a physically-grounded visibility model. Honest uncertainty, not wishful thinking. How clarity works → Bite score A 0–10 number answering "is now a good time to fish?" — combining tide, moon, solunar tables, barometric trend, and local patterns. Cuts through the noise so you get to the water at the right hour. What is a bite score? → Safety, always free Shark tag alerts (OCEARCH), buddy GPS sharing, SOS, and breath-hold monitoring are permanently free — no Pro gate, no paywall. Some features shouldn't cost money. Built differently A verdict, not a dashboard. Every other fishing app throws numbers at you — wind, swell, tide, moon, pressure, twelve species cards — and leaves the decision to you. Submarius reads those signals and gives you one answer: GO or DON'T. Color-coded. Explainable. Tap any factor to see exactly why. PRIME 9.0 – 10 · everything aligned, drop what you're doing and go GOOD 7.0 – 8.9 · confidently worth the drive FAIR 5.0 – 6.9 · mixed — check which factor is off ROUGH below 5 · stay home, tie flies, train breath-hold Designed for every activity Pick your mode — the dashboard reorders itself around the signals that matter for that activity. Multi-select supported. Switch anytime. Free to start. Current conditions, verdict, bite score, community spots, and every safety feature are free forever.

Pro unlocks 8-day forecasts, unlimited spots, premium overlays, and offline maps.