Social Brain Theory suggests that human social networks are organized into layers due to cognitive limitations. These layers correspond to specific categories, commonly referred to as 'Dunbar's Numbers.'

The Social Brain Contacts app leverages this theory by enabling you to sort and manage your phone contacts according to these categories. By fitting your contacts into this framework, the app provides a structured way to handle your social connections, making it easier to manage and reducing the mental effort needed to navigate a complex network of relationships.