PeopleSync Client The PeopleSync Client app is an Android CardDAV client for businesses. The app synchronizes address lists and contacts from the messageconcept PeopleSync server software. The contacts will be synchronized to the default contact store on your Android device and will be accessible from the default contacts app and your favorite 3rd party apps. The app was built for business usage and central administration through the IT staff. In a typical usage scenario the address lists to