Speciface

Reliable pass cards and access control systems can be costly for businesses. Are these expenses always justified? Many employees wear badges, but who can be sure of their authenticity? Yet people are often compelled to believe them and even let a stranger into the home (when interacting with utilities, for instance). Although there is a simple way for all to check if the person they are dealing with is a valid employee of your organization, even when that person is outside the door. No access to personal data is required.

I'll try this. Nice tool

I've just added several important features there: now you can share/see faces of people around and initiate a short chat if you like and even more: you can ask a requesting party some predefined question (a teaser) before any further interaction. Now I think this app can also be used in public places as a kind of meeting/dating service for people, who are too shy to speak first to a stranger. What do you think?