Touchless contact information exchange technology

2. BLE (Bluetooth Low Energy)

Enables proximity-based interactions without requiring a physical tap. Powered badges or smartphones can detect nearby devices and support automatic networking through compatible software.

Best for: hands-free networking and proximity detection.

3. RFID (Radio Frequency Identification)

A broader family of radio-frequency technologies that includes NFC. Commonly used for event access, attendee identification, ticketing, and check-in.

Best for: event credentials and automated entry.

4. QR codes

A printed or digital code links to a contact profile, which someone opens using their phone camera. It is a useful alternative when NFC is unavailable.

Best for: inexpensive, widely compatible contact sharing.

Which term should you use?

For example, event platforms such as CrowdPass offer NFC-based check-in and contact exchange.tapora.io+1

One important distinction: NFC usually requires a deliberate tap or very close proximity. If you mean that two people walk past each other and their contact information is exchanged automatically, BLE-based proximity technology is more relevant.

While NFC is the gold standard for "tap-to-share" wearables, other technologies are sometimes used alongside it depending on the setting:

• QR Codes (Optical): Often printed directly on the front or back of NFC smart badges as a backup for older smartphones that lack active NFC readers.
• RFID (Radio Frequency Identification): While NFC is a type of RFID, lower-frequency RFID (like 125 kHz) or long-range UHF RFID is occasionally used for massive event tracking, gate access, or cashless festival entry, though it isn't readable by standard consumer smartphones for contact sharing.wirehousemedia.com
• BLE (Bluetooth Low Energy): Used in some proximity-based networking beacons at massive tech conventions to log interactions when people pass close to one another, though it requires more power and active components than an NFC chip.

If you're looking into implementing this for an event or personal use, let me know:

• Are you interested in custom-branded badges/wristbands or a software platform to manage the data?
• Do you need it to work app-free via standard smartphone taps?