So I built Cardio: a digital card/profile you can share with just a QR code or link. It saves directly into your contact, so no more “Who was this again?” moments.

- Built with Next.js, Adobe, and Stripe - Uses AI tools (Cursor, ChatGPT) to accelerate development - No app install needed: just tap, scan, or share

I’m a solo builder from a non-dev background, and this is my first product. I launched it 10 days ago and made my first sales.

Would love any feedback! performance, UI clarity, growth ideas or anything. Thanks HN!