This is a people and event organiser app. It lets you create groups of people from your address books, as well as creating new people records that are only viewable in this app.
You can create attributes for the groups, so you can group and sort your people information easily according to different attributes.
You can create events, and add the groups as participants for the events. Attributes can then be capture data of the people in the event.
You can assign the different people in your groups as users and sync the data with them.
You can manage your own repository for all your information store and sync-ing by creating your own profile and link them to your own website. Source for the repository is available on http://www.practical-limits.com/pple/pple_source.php.