Product · Aug 20, 2026 · 5 min read
Why Nurnex Core is free — and why it stays that way
Your data should not come with a monthly bill. Here is the business model that lets us say that out loud.
When we started Nurnex, the smart-ring category had settled into a habit: sell a beautiful piece of hardware, then charge every month to see what it measured. We understood the economics. We just didn't like the relationship it created.
So we did the maths differently. The earring is priced to be profitable on its own. Nurnex Core — scores, stages, heart rate, HRV, temperature and cycle tracking — is part of the product, not a trial. Nurnex+ exists for the expensive, compute-heavy insights and the AI coach, and it is priced so that most people can decide with real data whether it is worth it.
If we ever change what Core includes, the earrings already out there keep what they have. That is a promise we are writing into our terms, not a marketing line.
Editor's note: sample article for layout. Replace with your editorial content, add author bylines and images as needed.