Contacts In Common

Discover how connected you really are. Instantly create or join a room, share a QR code, and see which contacts you have in common with others — no sign-up required.

Contacts in Common makes it easy to see how close we’re all connected. Whether you’re meeting new people, team building, or just curious, this app reveals shared contacts between you and 1 or more others in seconds.

• Host or Join with Ease: Generate a QR code to start a room or scan one to join — no accounts, no hassle.
• Private & Secure: All data is anonymous, entries delete automatically after 15 minutes, and no contact names are ever stored. Only hashed emails and phone numbers are processed.
• Team Building Made Fun: Spark conversations and strengthen groups by instantly finding out who knows who.
• Completely Free: No sign-ups, no subscriptions — just simple connection.

See how small the world really is with Contacts in Common.