Javier Aguilar Martín

I build tools that show their own maths.

About

AI engineer working on automation and agentic systems, and founder of AGILabs. I build for teams automating complex, manual processes — and on the side I ship small tools that show their own maths, like a vitamin D calculator that tells you when the answer is "you can't". javieraguilar.ai

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Tastemaker

Gone streaking

Maker History

VitaminD ExplorerSun and vitamin D, calculated for your skin type
Sep 2026

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Joined Product HuntAugust 27th, 2026

Forums

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20h ago

VitaminD Explorer - Sun and vitamin D, calculated for your skin type

Generic advice says "get 15 minutes of sun". That's right for two of the six skin types and wrong for the rest. This calculates your window from your skin, location, age and live UV — 5 min for type I, 30 for type VI. Free, no account, 6 languages.