Status, an iOS/Android app has been designed in such a way that it automatically updates and shares information about what the users are up to with their friends.
The app helps users to let their friends know why exactly they aren't able to receive their calls.
According to Tech Crunch, Status uses a big ol' array of data to figure out what one is up to, and automatically shares that information with a finely-honed list of friends.
Status can find out about the whereabouts of the users via geofencing (and the Wi-Fi network that one is connected to) and automatically set ones status to "At [wherever]."
The report added that in case the user is somewhere that the app doesn't recognize, it'll just say "Out and about.