Cluster is a new web site that makes it possible to create private group spaces where you share photos and memories with the people you care about. Create a space with family, a group of friends, co-workers, people from your hometown, or anyone else. It’s great for new moms, sharing photos of a new baby with close friends and family, sharing old family photographs with distant cousins, and for sharing memories with friends that you don’t wish to share publicly.
Cluster is primarily a photo sharing site for Android and iOS (iPad, iPhone, and iPod Touch) mobile devices. It also includes video and notes, along with feedback from your invited members. It focuses on privacy and security.