Cardio
I kept forgetting names and contacts… so I built Cardio. 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!
Cardio launched on May 6, 2025 with 134 votes, #307 of 7,905 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Cardio is a digital card built for the way we connect today—clean, fast, and always on. No apps, no printing, just one smart link or scan that shares your professional details in seconds.
Cardio is a digital card built for the way we connect today—clean, fast, and always on. No apps, no printing, just one smart link or scan that shares your professional details in seconds. Whether you're freelancing, building a brand, or meeting someone new, Cardio makes it effortless to share who you are, anytime, anywhere.
It brings your name, photo, role, contact info, social links, and key details together in one place. Share it with a QR code or smart link. It brings your name, photo, role, contact info, social links, and key details together in one place. Share it with a QR code or smart link. We've upgraded everything—phones, payments, even boarding passes. But most people still share contacts with outdated tools. Send a link or scan your QR code. It works on any device. No apps. No downloads. One tap saves your full profile into their phonebook. Easy and professional. Cardio lets you instantly share your role, startup, and key links with investors, partners, or press. " I made one for a quick intro call…from mycardio.co
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