Sickweather is launching the first major update to its iPhone app which was released last November and alerts users in real-time when they enter Sick Zones, which are areas where illnesses are reported on social media.

The latest version of the app adds an element of crowd-sourcing, allowing users to report illnesses directly and anonymously to the Sickweather map.

When someone publicly posts “My kids have strep” on Facebook or Twitter, Sickweather qualifies that report using its patent-pending technology and then plots it on a map. Then, when a Sickweather user travels near that report, they will get a real-time alert on their iPhone warning them of their proximity to strep throat, effectively making Sickweather the Doppler radar for sickness.

“With this new version, Sickweather is like the Foursquare for sickness” says Graham Dodge, CEO of Sickweather. “When someone checks-in their symptoms with us, not only is their report anonymously mapped for their community to be alerted, but it is also logged to their own ‘My Reports Map’ which can be used to track when and where they’ve been sick, or have come in contact with others who are sick.”

The new Sickweather app is available in the App Store as a free download.