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.
