Yarner is a free Android application developed by Spinner of Yarns that combines the features of a forum and a social network. It allows users to engage in discussions with both friends and strangers on a wide range of topics, and also provides a platform for businesses and organizations to share information with their followers. The app offers several features, including private messaging, anonymous posting, and the ability to tag users or corners in posts and replies. Users can also customize their profiles with their own theme color and create polls or share images and videos with others. Overall, Yarner presents a unique approach to social networking that blurs the line between personal connections and topical discussions.