xCard
NFC and QR digital business cards: tap a card to share your profile.
- Role
- Mobile · Full-stack
- Year
- 2023
- Platforms
- iOS
- Android
- Web
- Stack
- Flutter
- NFC
- Firebase Auth
- Node.js
- Express
- MongoDB
- Links
A business card you tap: NFC and QR digital cards that share a full profile in a second.
What it is
xCard turns a business card into a tap. People build a profile in the app, write its link to an NFC card, and share it by tap, QR code or link. Profiles open as fast web pages with contact details, socials, services, products, videos and an enquiry form.
I worked on the Flutter app and about half of the Node.js backend in 2023, for Acute Angel in Kochi.
The app
What it does
Tap to share
Write a profile link to an NFC card; any phone can read it.
QR and links
Share by QR code or link when there's no card to hand.
Rich profiles
Contact details, services, products, videos, documents and an enquiry form.
Teams
Admins manage groups of cards and export everything to Excel.
How it fits together
- Mobile appFlutter
- NFC cardHolds the profile link
- BackendNode.js + MongoDB
- Profile pageServer-rendered
- Mobile app connects to NFC card (writes link)
- Mobile app connects to Backend
- NFC card connects to Profile page (tap opens)
- Backend connects to Profile page
- Profiles are plain web pages, so anyone can open one without installing anything.
- Phone-number sign-in keeps setup to a one-time code.