Building calm, practical software
LangRun builds calm, practical software for real life.
Our first product is Flun — nutrition tracking that adapts to you, so missed days don’t turn into quitting.
Want the product page? Go to flun.app.
Flun
ProductNutrition tracking that fits real life.
Try now
Try Flun risk-free for 7 days
We’ll remind you before your trial ends. No surprises.
Available on iOS and Android.
About
A small team focused on product quality
LangRun is a product studio. We ship consumer software that feels calm, helpful, and easy to return to.
Simple by default
We bias toward fewer screens, fewer settings, and calmer UX.
Privacy-respecting
We don’t sell personal data. We build trust into the product.
Craft + iteration
We ship, measure, listen, and refine — relentlessly.
Contact
Talk to the team
Questions, partnerships, or press — we reply within 1–2 business days.