How Does NFC Actually Work? A Simple, Non-Technical Explanation

You use NFC daily without noticing: tapping a bank card, a metro pass, an office door. The same idea powers a smart business card.

What's inside the card?

A rice-grain-sized chip wrapped by a thin copper antenna. No battery, no processor, no moving parts.

Where does the power come from?

The phone. It emits a small magnetic field; the card's antenna harvests it into just enough energy to run the chip for a fraction of a second. This is inductive coupling — the reason the card never needs charging.

What's stored on the chip?

A tiny NDEF record, usually just a URL such as rovya.link/yourname. The real content lives on the web, which is why you can edit it anytime without touching the card.

Is it safe?

• Very short range: under 4 cm — it cannot be read from a distance.
• Read-only: we lock the chip after programming.
• No sensitive data on the card: just a public link.
• Nothing opens automatically: the phone shows a notification; the user decides.

NFC vs QR vs Bluetooth

In practice the best answer is both: NFC for speed, QR as a guaranteed fallback. That's why every ROVYA card carries a printed QR on the back.

FAQ

Can an NFC card be cloned?

The card only holds a public link and we lock it against writing. A copy gives nothing more than sharing the link itself.

Can water or magnets damage the card?

The chip is magnet-resistant, and both steel and PVC handle normal moisture. Just avoid hard bending.