Built for people who
live by the seasons.
Aurinko — Finnish for Sun — was born from a simple observation: human energy is seasonal. Your app should know that.
The Origin
A December run in Helsinki that changed everything.
In December 2024, a developer living in Helsinki opened his fitness app at 14:45. Sunset was in 15 minutes. The app suggested a 60-minute outdoor trail run.
The temperature was -8°C. The trail was icy. He had eaten once that day (typical dark-winter appetite suppression). His HRV was 18% below baseline.
The app had no idea. It just wanted its checkbox ticked.
That's when Aurinko was born — not as an idea, but as a frustration.
Helsinki · December
What Aurinko would have said:
"Sunset is in 15 minutes. It's -8°C. Your HRV is low. Perfect day for 30-min indoor yoga and a warm meal."
Our Philosophy
Three principles. One app.
Environment First
Every recommendation starts with where you are and what the sky looks like. Not yesterday's steps. Not a static calendar. The world, right now.
30 Seconds a Day
We designed for the person with 30 seconds, not 30 minutes. The check-in is 3 taps. The plan is one sentence. The insight compounds over time.
No Perfect Weather
We don't optimize for summer conditions. We optimize for your conditions, today. Bad weather isn't an excuse — it's a different kind of opportunity.
The Technology
Modern infrastructure,
built to last.
Aurinko is built as a small, efficient distributed system — designed to run under €15/month until 500 users, without sacrificing quality or reliability.
Design Principles
Development Roadmap
7 phases from foundation to global expansion. Currently in Phase 0.
View on GitHubWhy Finland
Aurinko means Sun in Finnish.
Finland is where seasonal extremes are most felt. From 21-hour summer days to 5-hour winter darkness — Finnish people have developed a unique relationship with light that shapes everything from culture to architecture to wellness.
We named the app after the sun because the sun is the most important variable in human wellness that no fitness app accounts for. Aurinko fixes that — for everyone, everywhere.
Ready to train with the world?
The first step is a 30-second check-in. The result is a fitness practice that actually fits your life, season by season.
Get Started Free