One tap.
Your whole world.

Tag tap and phone tap are different.

These controls read and write physical NDEF tags. Turning an Android phone into an NFC card requires the Android companion. A website cannot enable phone card emulation.

For a permanent sticker, use a public ID or revocable locker. A timed AIR TOUCH link stops working when it expires or is revoked. Writing a tag never makes a payment or accepts a handoff.