Today
The day, as your skin will meet it.
Set where you are and what skin you're standing in. Then mark when you were outside, and the day reads itself back to you.
Where are you
Your skin
Which of these sounds most like you in strong sun? It helps to define your skin type.
When you were outside
Drag down the band. Or pick one.
How much skin was uncovered
See each pathway
This was worked out. The band measures it.
We are building a preview of your day — tomorrow’s window, before you have to guess at it. Join and you get it first, soon. And the band, when the first units are ready.
This read your day from sunrise. When were you up?
The days behind you
The instrument
Everything above was worked out. None of it was measured.
The reading came from where the sun was and what you remembered. That's a good guess. It's still a guess.
The wearable measures it. What light actually reaches you, and how much of a day goes by indoors without you perceiving it.
That's the part nobody can feel. Not the hour you spent outside — the ones you didn't.
We're building from Coimbra. From Portugal with Love.
The study
A clinical study of this is board-authorised at ULS Região de Leiria — a three-arm, sixty-day trial measuring serum vitamin D at the start and at the end. Enrolment opens in 2027.
What you just read is worked out. What the study reports is measured.
Ethics opinion Parecer 44/CEULSRL/2026 · Department of Dermatology, ULS Região de Leiria · See the evidence
Be there when it ships.
The first bands go to the people who joined early. No noise, no weekly newsletter — only what matters, when it matters.