How Frenzapp gets the version of other apps?

Does anyone know how Frenzapp gets the Version of other installed apps?

They probably use sysctl to enumerate running processes which returns kinfo_proc struct for each process. Looking at kinfo_proc there is no version or file time stamps or anything I can associate with a version.

So I am wondering开发者_如何学Go how they do it. Does anyone know?

Here is the screen shot with the app version:

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It is not the version of the app currentlty installed on your device but the latest version available on the App Store, obtained through iTunes API.

Erwan (creator of Frenzapp)