June 20, 2026
Water app launches, commenters dive in
Show HN: Submarius – Global water clarity for divers
A new diving app says it cuts the clutter, but commenters are calling splashy marketing nonsense
TLDR: Submarius is a new app that tells divers and fishers whether conditions are good, while also offering free safety tools. But commenters fixated less on the ocean features and more on roasting its “not a dashboard” claim and ultra-startup website style.
Submarius arrived on Hacker News promising a dream for ocean lovers: an app that tells divers, fishers, and boaters when to go and when to stay home. It offers water-clarity forecasts, fishing “bite scores,” and free safety tools like GPS buddy sharing and shark alerts. The pitch is simple: stop drowning users in numbers and just give them a verdict. Sounds neat, right? Well, the comments immediately grabbed the harpoon and aimed it at the marketing copy.
The biggest eye-roll was over the app’s bold line about being “a verdict, not a dashboard.” One commenter basically said: hold on, if you support a bunch of activities and rearrange the screen for each one... that still sounds like a dashboard, babe. Another jabbed that it even includes sailing but not rowing, which became the kind of tiny, weirdly specific complaint the internet loves to feast on. The other hot take was about the website itself, with one user declaring exhaustion over modern startup writing: “A thing, not a thing” and endless dramatic dashes everywhere. Ouch.
So while Submarius is trying to sell calm, clarity, and cleaner decision-making on the water, the community reaction was deliciously messier: part curiosity, part sarcasm, and part full-on roast of startup design language. The app may forecast ocean visibility, but in the comments, people saw right through the branding.
Key Points
- •Submarius is a mobile-first app for divers, fishers, boaters, and related water-activity users.
- •The app's water-clarity forecast uses satellite Kd490 turbidity, river-discharge plumes, wave mixing, and post-dive reports in a physically grounded visibility model.
- •Its bite score is a 0–10 fishing-timing indicator based on tide, moon, solunar tables, barometric trend, and local patterns.
- •Safety features including OCEARCH shark tag alerts, buddy GPS sharing, SOS, and breath-hold monitoring are described as permanently free.
- •The free tier includes current conditions, verdicts, bite score, community spots, and safety tools, while Pro adds 8-day forecasts, unlimited spots, premium overlays, and offline maps.