Mail Online - We've all had those heart-sink moments when we've opened the door to an unwanted salesman or uninvited neighbour.
Now there's a new app that lets you know exactly who's at your front door - and it works when you're not at home.
It would be relatively easy for the caller to get confirmation that the person is not at home, as opposed to just ignoring the door or asleep, and could burgle the place! At the moment if you don't answer the door the caller does not know if the property is empty.
TechSpy is a community of awesome people posting and discussing the latest tech news. It’s part of NewsBoiler, a network of social news sites covering today’s pop culture.