About HealthSand

HealthSand is a free collection of browser-based tools and guides for beach days and coastal living — sand workouts, sun safety, seaside hydration, and outdoor recovery — built so that every answer shows its working and every number stays on your device.

What we make

The site holds twenty tools in four groups: beach and outdoor fitness calculators, sun safety and coastal environment tools, hydration and natural mineral tools, and outdoor recovery and sleep tools. Behind them sit sixty guides, three per tool, that explain the reasoning, the common mistakes, and the practical detail that turns a result into a habit. Everything is written for ordinary readers, not specialists, and everything is free to use without an account.

How we work

Three principles shape every page. First, show the working: a calculator states its formula, its multipliers, and its assumptions, so you can check it, disagree with it intelligently, and adjust it. Second, respect the coast: sand, wind, humidity, UV, and salt change the numbers, so the tools model those factors instead of ignoring them. Third, keep your data yours: every tool runs entirely in your browser, timers and trackers store data only in your browser's local storage, and nothing you enter is sent to us or anyone else.

What we are not

HealthSand is not a medical service, and its tools are not medical devices. The content offers general information for everyday decisions — planning a beach workout, timing sunscreen, mixing a bath, stretching after a walk — and it is not a substitute for professional advice, diagnosis, or treatment. If you have a medical condition, take medication, or are worried about a symptom, please talk to a clinician. Where evidence is thin — grounding, salt therapy, and similar topics — the guides say so plainly rather than overstating the case.

Corrections and feedback

If you find a wrong figure, a broken calculation, or a guide that disagrees with your experience, we want to hear about it. The contact page explains how to reach us, and the details that get a problem fixed fastest are the tool, the inputs you entered, the result you got, and what you expected instead. We read every message and prioritise corrections to numbers, because a wrong number is worse than a missing page.