Included are both the Android and iOS apps source code. Please consider these still as Beta and being worked on although they are already in a good state.
You can test many of the app features using the iOS simulator installed with the iOS SDK and Xcode, but you need an actual device to test push notifications. The device must have at least iOS 6.x installed.
Follow instructions found here [url removed, login to view] to install Xcode.
Double click .xcodeproj file to open the project in Xcode.
In Project Navigator, locate the [url removed, login to view] file and click it to edit the file as shown in the screenshot below.